256212238635 has 48 divisors (see below), whose sum is σ = 494973516960. Its totient is φ = 121839621120.

The previous prime is 256212238619. The next prime is 256212238637. The reversal of 256212238635 is 536832212652.

256212238635 is a `hidden beast` number, since 2 + 5 + 6 + 2 + 1 + 2 + 2 + 3 + 8 + 635 = 666.

256212238635 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256212238635 - 2⁴ = 256212238619 is a prime.

It is a super-2 number, since 2×256212238635² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (256212238637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8799096 + ... + 8828165.

It is an arithmetic number, because the mean of its divisors is an integer number (10311948270).

Almost surely, 2^256212238635 is an apocalyptic number.

256212238635 is a deficient number, since it is larger than the sum of its proper divisors (238761278325).

256212238635 is a wasteful number, since it uses less digits than its factorization.

256212238635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17627308 (or 17627305 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The spelling of 256212238635 in words is "two hundred fifty-six billion, two hundred twelve million, two hundred thirty-eight thousand, six hundred thirty-five".