256020155056536 has 64 divisors (see below), whose sum is σ = 689286852576000. Its totient is φ = 78775224355968.

The previous prime is 256020155056517. The next prime is 256020155056553. The reversal of 256020155056536 is 635650551020652.

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 15 ways as a sum of consecutive naturals, for example, 151822765 + ... + 153499811.

It is an arithmetic number, because the mean of its divisors is an integer number (10770107071500).

Almost surely, 2^{256020155056536} is an apocalyptic number.

256020155056536 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

256020155056536 is an abundant number, since it is smaller than the sum of its proper divisors (433266697519464).

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

256020155056536 is a wasteful number, since it uses less digits than its factorization.

256020155056536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2166368 (or 2166364 counting only the distinct ones).

The product of its (nonzero) digits is 8100000, while the sum is 51.

The spelling of 256020155056536 in words is "two hundred fifty-six trillion, twenty billion, one hundred fifty-five million, fifty-six thousand, five hundred thirty-six".