256402412510 has 64 divisors (see below), whose sum is σ = 467513640000. Its totient is φ = 101241280512.

The previous prime is 256402412509. The next prime is 256402412527. The reversal of 256402412510 is 15214204652.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197688182 + ... + 197689478.

It is an arithmetic number, because the mean of its divisors is an integer number (7304900625).

Almost surely, 2^256402412510 is an apocalyptic number.

256402412510 is a deficient number, since it is larger than the sum of its proper divisors (211111227490).

256402412510 is a wasteful number, since it uses less digits than its factorization.

256402412510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2205.

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 256402412510 in words is "two hundred fifty-six billion, four hundred two million, four hundred twelve thousand, five hundred ten".