157131256004 has 24 divisors (see below), whose sum is σ = 278504475480. Its totient is φ = 77563754496.

The previous prime is 157131256001. The next prime is 157131256013. The reversal of 157131256004 is 400652131751.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21966204100 + 135165051904 = 148210^2 + 367648^2 .

It is a super-2 number, since 2×157131256004² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (157131256001) 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, 529757 + ... + 771300.

It is an arithmetic number, because the mean of its divisors is an integer number (11604353145).

Almost surely, 2^157131256004 is an apocalyptic number.

It is an amenable number.

157131256004 is a deficient number, since it is larger than the sum of its proper divisors (121373219476).

157131256004 is a wasteful number, since it uses less digits than its factorization.

157131256004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301447 (or 1301445 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 35.

Adding to 157131256004 its reverse (400652131751), we get a palindrome (557783387755).

The spelling of 157131256004 in words is "one hundred fifty-seven billion, one hundred thirty-one million, two hundred fifty-six thousand, four".