255961927465 has 32 divisors (see below), whose sum is σ = 323375846400. Its totient is φ = 194120323584.

The previous prime is 255961927423. The next prime is 255961927489. The reversal of 255961927465 is 564729169552.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 255961927465 - 2¹⁹ = 255961403177 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7814352 + ... + 7847038.

It is an arithmetic number, because the mean of its divisors is an integer number (10105495200).

Almost surely, 2^255961927465 is an apocalyptic number.

It is an amenable number.

255961927465 is a deficient number, since it is larger than the sum of its proper divisors (67413918935).

255961927465 is a wasteful number, since it uses less digits than its factorization.

255961927465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33321.

The product of its digits is 40824000, while the sum is 61.

The spelling of 255961927465 in words is "two hundred fifty-five billion, nine hundred sixty-one million, nine hundred twenty-seven thousand, four hundred sixty-five".