157502621956 has 27 divisors (see below), whose sum is σ = 280308349503. Its totient is φ = 77436493920.

The previous prime is 157502621953. The next prime is 157502622007. The reversal of 157502621956 is 659126205751.

The square root of 157502621956 is 396866.

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

It can be written as a sum of positive squares in 4 ways, for example, as 1938640900 + 155563981056 = 44030^2 + 394416^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157502621953) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 48416026 + ... + 48419278.

Almost surely, 2^157502621956 is an apocalyptic number.

157502621956 is the 396866-th square number.

It is an amenable number.

157502621956 is a deficient number, since it is larger than the sum of its proper divisors (122805727547).

157502621956 is an frugal number, since it uses more digits than its factorization.

157502621956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6632 (or 3316 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 49.

Multiplying 157502621956 by its sum of digits (49), we get a square (7717628475844 = 2778062²).

The spelling of 157502621956 in words is "one hundred fifty-seven billion, five hundred two million, six hundred twenty-one thousand, nine hundred fifty-six".