157964721515 has 16 divisors (see below), whose sum is σ = 190383706368. Its totient is φ = 125822158176.

The previous prime is 157964721503. The next prime is 157964721521. The reversal of 157964721515 is 515127469751.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 157964721515 - 2¹⁸ = 157964459371 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1118354 + ... + 1251656.

It is an arithmetic number, because the mean of its divisors is an integer number (11898981648).

Almost surely, 2^157964721515 is an apocalyptic number.

157964721515 is a deficient number, since it is larger than the sum of its proper divisors (32418984853).

157964721515 is a wasteful number, since it uses less digits than its factorization.

157964721515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134338.

The product of its digits is 2646000, while the sum is 53.

The spelling of 157964721515 in words is "one hundred fifty-seven billion, nine hundred sixty-four million, seven hundred twenty-one thousand, five hundred fifteen".