256724102170550 has 48 divisors (see below), whose sum is σ = 556018734746592. Its totient is φ = 86358943257600.

The previous prime is 256724102170531. The next prime is 256724102170567. The reversal of 256724102170550 is 55071201427652.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 256724102170495 and 256724102170504.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6919768571 + ... + 6919805670.

It is an arithmetic number, because the mean of its divisors is an integer number (11583723640554).

Almost surely, 2^{256724102170550} is an apocalyptic number.

256724102170550 is an abundant number, since it is smaller than the sum of its proper divisors (299294632576042).

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

256724102170550 is a wasteful number, since it uses less digits than its factorization.

256724102170550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13839574313 (or 13839574308 counting only the distinct ones).

The product of its (nonzero) digits is 1176000, while the sum is 47.

The spelling of 256724102170550 in words is "two hundred fifty-six trillion, seven hundred twenty-four billion, one hundred two million, one hundred seventy thousand, five hundred fifty".