15372157538 has 8 divisors (see below), whose sum is σ = 23060176860. Its totient is φ = 7685431920.

The previous prime is 15372157501. The next prime is 15372157543. The reversal of 15372157538 is 83575127351.

It can be written as a sum of positive squares in 2 ways, for example, as 15027572569 + 344584969 = 122587^2 + 18563^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 15372157492 and 15372157501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293153 + ... + 341588.

Almost surely, 2^15372157538 is an apocalyptic number.

15372157538 is a deficient number, since it is larger than the sum of its proper divisors (7688019322).

15372157538 is a wasteful number, since it uses less digits than its factorization.

15372157538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646852.

The product of its digits is 882000, while the sum is 47.

The spelling of 15372157538 in words is "fifteen billion, three hundred seventy-two million, one hundred fifty-seven thousand, five hundred thirty-eight".