157078478631 has 8 divisors (see below), whose sum is σ = 220461022720. Its totient is φ = 99207460152.

The previous prime is 157078478597. The next prime is 157078478671. The reversal of 157078478631 is 136874870751.

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

It is not a de Polignac number, because 157078478631 - 2⁶ = 157078478567 is a prime.

It is a super-2 number, since 2×157078478631² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 2755762783 = 157078478631 / (1 + 5 + 7 + 0 + 7 + 8 + 4 + 7 + 8 + 6 + 3 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157078478671) 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, 1377881335 + ... + 1377881448.

It is an arithmetic number, because the mean of its divisors is an integer number (27557627840).

Almost surely, 2^157078478631 is an apocalyptic number.

157078478631 is a deficient number, since it is larger than the sum of its proper divisors (63382544089).

157078478631 is a wasteful number, since it uses less digits than its factorization.

157078478631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2755762805.

The product of its (nonzero) digits is 7902720, while the sum is 57.

The spelling of 157078478631 in words is "one hundred fifty-seven billion, seventy-eight million, four hundred seventy-eight thousand, six hundred thirty-one".