256631702123142 has 48 divisors (see below), whose sum is σ = 556894837379088. Its totient is φ = 85411676347200.

The previous prime is 256631702123123. The next prime is 256631702123191. The reversal of 256631702123142 is 241321207136652.

256631702123142 is a `hidden beast` number, since 2 + 5 + 6 + 6 + 317 + 0 + 2 + 12 + 314 + 2 = 666.

It is a super-2 number, since 2×256631702123142² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1237862892 + ... + 1238070192.

It is an arithmetic number, because the mean of its divisors is an integer number (11601975778731).

Almost surely, 2^{256631702123142} is an apocalyptic number.

256631702123142 is an abundant number, since it is smaller than the sum of its proper divisors (300263135255946).

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

256631702123142 is a wasteful number, since it uses less digits than its factorization.

256631702123142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313285 (or 313282 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

Adding to 256631702123142 its reverse (241321207136652), we get a palindrome (497952909259794).

The spelling of 256631702123142 in words is "two hundred fifty-six trillion, six hundred thirty-one billion, seven hundred two million, one hundred twenty-three thousand, one hundred forty-two".