256025300556465 has 48 divisors (see below), whose sum is σ = 484126357530816. Its totient is φ = 124131994646400.

The previous prime is 256025300556449. The next prime is 256025300556479. The reversal of 256025300556465 is 564655003520652.

256025300556465 is a `hidden beast` number, since 2 + 5 + 6 + 0 + 25 + 3 + 0 + 0 + 556 + 4 + 65 = 666.

It is not a de Polignac number, because 256025300556465 - 2⁴ = 256025300556449 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38919435 + ... + 45019695.

It is an arithmetic number, because the mean of its divisors is an integer number (10085965781892).

Almost surely, 2^{256025300556465} is an apocalyptic number.

It is an amenable number.

256025300556465 is a deficient number, since it is larger than the sum of its proper divisors (228101056974351).

256025300556465 is a wasteful number, since it uses less digits than its factorization.

256025300556465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6185070 (or 6185067 counting only the distinct ones).

The product of its (nonzero) digits is 32400000, while the sum is 54.

The spelling of 256025300556465 in words is "two hundred fifty-six trillion, twenty-five billion, three hundred million, five hundred fifty-six thousand, four hundred sixty-five".