255405990963 has 32 divisors (see below), whose sum is σ = 360741821440. Its totient is φ = 160285754880.

The previous prime is 255405990953. The next prime is 255405990967. The reversal of 255405990963 is 369099504552.

It is a happy number.

It is not a de Polignac number, because 255405990963 - 2⁶ = 255405990899 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255405990967) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13371606 + ... + 13390692.

It is an arithmetic number, because the mean of its divisors is an integer number (11273181920).

Almost surely, 2^255405990963 is an apocalyptic number.

255405990963 is a deficient number, since it is larger than the sum of its proper divisors (105335830477).

255405990963 is a wasteful number, since it uses less digits than its factorization.

255405990963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20587.

The product of its (nonzero) digits is 13122000, while the sum is 57.

The spelling of 255405990963 in words is "two hundred fifty-five billion, four hundred five million, nine hundred ninety thousand, nine hundred sixty-three".