157681646881 has 8 divisors (see below), whose sum is σ = 182134950624. Its totient is φ = 134914777920.

The previous prime is 157681646851. The next prime is 157681646897. The reversal of 157681646881 is 188646186751.

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 157681646881 - 2³¹ = 155534163233 is a prime.

It is a super-2 number, since 2×157681646881² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (157681646831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421608495 + ... + 421608868.

It is an arithmetic number, because the mean of its divisors is an integer number (22766868828).

Almost surely, 2^157681646881 is an apocalyptic number.

157681646881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

157681646881 is a deficient number, since it is larger than the sum of its proper divisors (24453303743).

157681646881 is a wasteful number, since it uses less digits than its factorization.

157681646881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843217391.

The product of its digits is 15482880, while the sum is 61.

The spelling of 157681646881 in words is "one hundred fifty-seven billion, six hundred eighty-one million, six hundred forty-six thousand, eight hundred eighty-one".