256733532065572 has 12 divisors (see below), whose sum is σ = 449284149853056. Its totient is φ = 128366632107560.

The previous prime is 256733532065519. The next prime is 256733532065581. The reversal of 256733532065572 is 275560235337652.

It is a self number, because there is not a number n which added to its sum of digits gives 256733532065572.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29104504 + ... + 36885487.

It is an arithmetic number, because the mean of its divisors is an integer number (37440345821088).

Almost surely, 2^{256733532065572} is an apocalyptic number.

It is an amenable number.

256733532065572 is a deficient number, since it is larger than the sum of its proper divisors (192550617787484).

256733532065572 is a wasteful number, since it uses less digits than its factorization.

256733532065572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66962618 (or 66962616 counting only the distinct ones).

The product of its (nonzero) digits is 238140000, while the sum is 61.

The spelling of 256733532065572 in words is "two hundred fifty-six trillion, seven hundred thirty-three billion, five hundred thirty-two million, sixty-five thousand, five hundred seventy-two".