256275800550 has 144 divisors (see below), whose sum is σ = 858424200192. Its totient is φ = 53252107200.

The previous prime is 256275800527. The next prime is 256275800563. The reversal of 256275800550 is 55008572652.

256275800550 is a `hidden beast` number, since 2 + 5 + 62 + 7 + 580 + 0 + 5 + 5 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 256275800496 and 256275800505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3663414 + ... + 3732713.

It is an arithmetic number, because the mean of its divisors is an integer number (5961279168).

Almost surely, 2^256275800550 is an apocalyptic number.

256275800550 is an abundant number, since it is smaller than the sum of its proper divisors (602148399642).

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

256275800550 is a wasteful number, since it uses less digits than its factorization.

256275800550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7396163 (or 7396155 counting only the distinct ones).

The product of its (nonzero) digits is 840000, while the sum is 45.

The spelling of 256275800550 in words is "two hundred fifty-six billion, two hundred seventy-five million, eight hundred thousand, five hundred fifty".