256151656178 has 16 divisors (see below), whose sum is σ = 419263701696. Its totient is φ = 116403002640.

The previous prime is 256151656171. The next prime is 256151656193. The reversal of 256151656178 is 871656151652.

It is a super-2 number, since 2×256151656178² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256151656171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1389701 + ... + 1563192.

It is an arithmetic number, because the mean of its divisors is an integer number (26203981356).

Almost surely, 2^256151656178 is an apocalyptic number.

256151656178 is a deficient number, since it is larger than the sum of its proper divisors (163112045518).

256151656178 is a wasteful number, since it uses less digits than its factorization.

256151656178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2956849.

The product of its digits is 3024000, while the sum is 53.

The spelling of 256151656178 in words is "two hundred fifty-six billion, one hundred fifty-one million, six hundred fifty-six thousand, one hundred seventy-eight".