256052167765 has 8 divisors (see below), whose sum is σ = 308231885880. Its totient is φ = 204195544512.

The previous prime is 256052167751. The next prime is 256052167771. The reversal of 256052167765 is 567761250652.

It can be written as a sum of positive squares in 4 ways, for example, as 6825568689 + 249226599076 = 82617^2 + 499226^2 .

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 256052167765 - 2¹⁷ = 256052036693 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80771970 + ... + 80775139.

It is an arithmetic number, because the mean of its divisors is an integer number (38528985735).

Almost surely, 2^256052167765 is an apocalyptic number.

It is an amenable number.

256052167765 is a deficient number, since it is larger than the sum of its proper divisors (52179718115).

256052167765 is a wasteful number, since it uses less digits than its factorization.

256052167765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161547431.

The product of its (nonzero) digits is 5292000, while the sum is 52.

The spelling of 256052167765 in words is "two hundred fifty-six billion, fifty-two million, one hundred sixty-seven thousand, seven hundred sixty-five".