15320157697 has 8 divisors (see below), whose sum is σ = 16534739816. Its totient is φ = 14110733952.

The previous prime is 15320157689. The next prime is 15320157707. The reversal of 15320157697 is 79675102351.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1052094096 + 14268063601 = 32436^2 + 119449^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 15320157697 - 2³ = 15320157689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15320157617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1283418 + ... + 1295299.

It is an arithmetic number, because the mean of its divisors is an integer number (2066842477).

Almost surely, 2^15320157697 is an apocalyptic number.

It is an amenable number.

15320157697 is a deficient number, since it is larger than the sum of its proper divisors (1214582119).

15320157697 is a wasteful number, since it uses less digits than its factorization.

15320157697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2579187.

The product of its (nonzero) digits is 396900, while the sum is 46.

The spelling of 15320157697 in words is "fifteen billion, three hundred twenty million, one hundred fifty-seven thousand, six hundred ninety-seven".