256630361144466 has 8 divisors (see below), whose sum is σ = 513260722288944. Its totient is φ = 85543453714820.

The previous prime is 256630361144369. The next prime is 256630361144467. The reversal of 256630361144466 is 664441163036652.

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

256630361144466 is an admirable number.

It is a super-2 number, since 2×256630361144466² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256630361144467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21385863428700 + ... + 21385863428711.

It is an arithmetic number, because the mean of its divisors is an integer number (64157590286118).

Almost surely, 2^{256630361144466} is an apocalyptic number.

256630361144466 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

256630361144466 is a wasteful number, since it uses less digits than its factorization.

256630361144466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42771726857416.

The product of its (nonzero) digits is 44789760, while the sum is 57.

The spelling of 256630361144466 in words is "two hundred fifty-six trillion, six hundred thirty billion, three hundred sixty-one million, one hundred forty-four thousand, four hundred sixty-six".