256640041103516 has 24 divisors (see below), whose sum is σ = 514388678522880. Its totient is φ = 109751032690992.

The previous prime is 256640041103507. The next prime is 256640041103521. The reversal of 256640041103516 is 615301140046652.

256640041103516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×256640041103516² (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 7 ways as a sum of consecutive naturals, for example, 9898168196 + ... + 9898194123.

It is an arithmetic number, because the mean of its divisors is an integer number (21432861605120).

Almost surely, 2^{256640041103516} is an apocalyptic number.

It is an amenable number.

256640041103516 is an abundant number, since it is smaller than the sum of its proper divisors (257748637419364).

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

256640041103516 is a wasteful number, since it uses less digits than its factorization.

256640041103516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19796362793 (or 19796362791 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 256640041103516 in words is "two hundred fifty-six trillion, six hundred forty billion, forty-one million, one hundred three thousand, five hundred sixteen".