15123772745 has 8 divisors (see below), whose sum is σ = 18774338760. Its totient is φ = 11681810560.

The previous prime is 15123772739. The next prime is 15123772793. The reversal of 15123772745 is 54727732151.

15123772745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 219513856 + 14904258889 = 14816^2 + 122083^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15123772745 - 2²⁴ = 15106995529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15123772696 and 15123772705.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 52150796 + ... + 52151085.

It is an arithmetic number, because the mean of its divisors is an integer number (2346792345).

Almost surely, 2^15123772745 is an apocalyptic number.

It is an amenable number.

15123772745 is a deficient number, since it is larger than the sum of its proper divisors (3650566015).

15123772745 is a wasteful number, since it uses less digits than its factorization.

15123772745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104301915.

The product of its digits is 411600, while the sum is 44.

The spelling of 15123772745 in words is "fifteen billion, one hundred twenty-three million, seven hundred seventy-two thousand, seven hundred forty-five".