157681646879 has 8 divisors (see below), whose sum is σ = 161045088960. Its totient is φ = 154318559616.

The previous prime is 157681646851. The next prime is 157681646897. The reversal of 157681646879 is 978646186751.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157681646879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157681646819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 933947 + ... + 1089779.

It is an arithmetic number, because the mean of its divisors is an integer number (20130636120).

Almost surely, 2^157681646879 is an apocalyptic number.

157681646879 is a deficient number, since it is larger than the sum of its proper divisors (3363442081).

157681646879 is a wasteful number, since it uses less digits than its factorization.

157681646879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177409.

The product of its digits is 121927680, while the sum is 68.

The spelling of 157681646879 in words is "one hundred fifty-seven billion, six hundred eighty-one million, six hundred forty-six thousand, eight hundred seventy-nine".