256672660160 has 56 divisors (see below), whose sum is σ = 698516316960. Its totient is φ = 88002054144.

The previous prime is 256672660109. The next prime is 256672660177. The reversal of 256672660160 is 61066276652.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×256672660160² (a number of 24 digits) contains 22 as substring.

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, 57290765 + ... + 57295244.

It is an arithmetic number, because the mean of its divisors is an integer number (12473505660).

Almost surely, 2^256672660160 is an apocalyptic number.

256672660160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256672660160 is an abundant number, since it is smaller than the sum of its proper divisors (441843656800).

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

256672660160 is a wasteful number, since it uses less digits than its factorization.

256672660160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114586033 (or 114586023 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 256672660160 in words is "two hundred fifty-six billion, six hundred seventy-two million, six hundred sixty thousand, one hundred sixty".