157865297680 has 80 divisors (see below), whose sum is σ = 371561932800. Its totient is φ = 62372007936.

The previous prime is 157865297641. The next prime is 157865297693. The reversal of 157865297680 is 86792568751.

It is a tau number, because it is divible by the number of its divisors (80).

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, 2272096 + ... + 2340544.

It is an arithmetic number, because the mean of its divisors is an integer number (4644524160).

Almost surely, 2^157865297680 is an apocalyptic number.

157865297680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 157865297680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185780966400).

157865297680 is an abundant number, since it is smaller than the sum of its proper divisors (213696635120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157865297680 is a wasteful number, since it uses less digits than its factorization.

157865297680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68816 (or 68810 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 64.

The spelling of 157865297680 in words is "one hundred fifty-seven billion, eight hundred sixty-five million, two hundred ninety-seven thousand, six hundred eighty".