256752265362551 has 8 divisors (see below), whose sum is σ = 296173507708800. Its totient is φ = 218016609839928.

The previous prime is 256752265362499. The next prime is 256752265362557. The reversal of 256752265362551 is 155263562257652.

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 256752265362551 - 2³⁰ = 256751191620727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256752265362557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171396705101 + ... + 171396706598.

It is an arithmetic number, because the mean of its divisors is an integer number (37021688463600).

Almost surely, 2^{256752265362551} is an apocalyptic number.

256752265362551 is a deficient number, since it is larger than the sum of its proper divisors (39421242346249).

256752265362551 is a wasteful number, since it uses less digits than its factorization.

256752265362551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342793411813.

The product of its digits is 226800000, while the sum is 62.

The spelling of 256752265362551 in words is "two hundred fifty-six trillion, seven hundred fifty-two billion, two hundred sixty-five million, three hundred sixty-two thousand, five hundred fifty-one".