15940830049 has 3 divisors (see below), whose sum is σ = 15940956307. Its totient is φ = 15940703792.

The previous prime is 15940829929. The next prime is 15940830151. The reversal of 15940830049 is 94003804951.

It is a happy number.

The square root of 15940830049 is 126257.

It is a perfect power (a square), and thus also a powerful number.

15940830049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 12191472225 + 3749357824 = 110415^2 + 61232^2 .

It is not a de Polignac number, because 15940830049 - 2²⁷ = 15806612321 is a prime.

It is a super-2 number, since 2×15940830049² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15940829987 and 15940830014.

It is not an unprimeable number, because it can be changed into a prime (15940840049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 63129 + ... + 189385.

Almost surely, 2^15940830049 is an apocalyptic number.

15940830049 is the 126257-th square number.

15940830049 is the 63129-th centered octagonal number.

It is an amenable number.

15940830049 is a deficient number, since it is larger than the sum of its proper divisors (126258).

15940830049 is an frugal number, since it uses more digits than its factorization.

15940830049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252514 (or 126257 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 15940830049 in words is "fifteen billion, nine hundred forty million, eight hundred thirty thousand, forty-nine".