256622401751004 has 18 divisors (see below), whose sum is σ = 648684404426240. Its totient is φ = 85540800583656.

The previous prime is 256622401750991. The next prime is 256622401751029. The reversal of 256622401751004 is 400157104226652.

256622401751004 is a `hidden beast` number, since 2 + 5 + 6 + 622 + 4 + 0 + 1 + 7 + 5 + 10 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3564200024284 + ... + 3564200024355.

Almost surely, 2^{256622401751004} is an apocalyptic number.

It is an amenable number.

256622401751004 is an abundant number, since it is smaller than the sum of its proper divisors (392062002675236).

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

256622401751004 is a wasteful number, since it uses less digits than its factorization.

256622401751004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7128400048649 (or 7128400048644 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

Adding to 256622401751004 its reverse (400157104226652), we get a palindrome (656779505977656).

The spelling of 256622401751004 in words is "two hundred fifty-six trillion, six hundred twenty-two billion, four hundred one million, seven hundred fifty-one thousand, four".