256515757335265 has 8 divisors (see below), whose sum is σ = 324019904002560. Its totient is φ = 194411942401392.

The previous prime is 256515757335157. The next prime is 256515757335287. The reversal of 256515757335265 is 562533757515652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256515757335265 - 2¹⁷ = 256515757204193 is a prime.

It is a super-2 number, since 2×256515757335265² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 256515757335265.

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 7 ways as a sum of consecutive naturals, for example, 1350082933249 + ... + 1350082933438.

It is an arithmetic number, because the mean of its divisors is an integer number (40502488000320).

Almost surely, 2^{256515757335265} is an apocalyptic number.

It is an amenable number.

256515757335265 is a deficient number, since it is larger than the sum of its proper divisors (67504146667295).

256515757335265 is a wasteful number, since it uses less digits than its factorization.

256515757335265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2700165866711.

The product of its digits is 992250000, while the sum is 67.

The spelling of 256515757335265 in words is "two hundred fifty-six trillion, five hundred fifteen billion, seven hundred fifty-seven million, three hundred thirty-five thousand, two hundred sixty-five".