15828910969 has 3 divisors (see below), whose sum is σ = 15829036783. Its totient is φ = 15828785156.

The previous prime is 15828910949. The next prime is 15828911057. The reversal of 15828910969 is 96901982851.

The square root of 15828910969 is 125813.

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

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., 156875625 + 15672035344 = 12525^2 + 125188^2 .

It is not a de Polignac number, because 15828910969 - 2⁹ = 15828910457 is a prime.

It is a super-2 number, since 2×15828910969² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15828910939) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 62907 + ... + 188719.

Almost surely, 2^15828910969 is an apocalyptic number.

15828910969 is the 125813-rd square number.

15828910969 is the 62907-th centered octagonal number.

It is an amenable number.

15828910969 is a deficient number, since it is larger than the sum of its proper divisors (125814).

15828910969 is an frugal number, since it uses more digits than its factorization.

15828910969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251626 (or 125813 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 58.

The spelling of 15828910969 in words is "fifteen billion, eight hundred twenty-eight million, nine hundred ten thousand, nine hundred sixty-nine".