256151763666 has 16 divisors (see below), whose sum is σ = 569226141600. Its totient is φ = 85383921204.

The previous prime is 256151763619. The next prime is 256151763677. The reversal of 256151763666 is 666367151652.

It is a super-2 number, since 2×256151763666² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 4743551179 = 256151763666 / (2 + 5 + 6 + 1 + 5 + 1 + 7 + 6 + 3 + 6 + 6 + 6).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2371775536 + ... + 2371775643.

It is an arithmetic number, because the mean of its divisors is an integer number (35576633850).

Almost surely, 2^256151763666 is an apocalyptic number.

256151763666 is an abundant number, since it is smaller than the sum of its proper divisors (313074377934).

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

256151763666 is a wasteful number, since it uses less digits than its factorization.

256151763666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4743551190 (or 4743551184 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 54.

The spelling of 256151763666 in words is "two hundred fifty-six billion, one hundred fifty-one million, seven hundred sixty-three thousand, six hundred sixty-six".