256735030885 has 8 divisors (see below), whose sum is σ = 309784148856. Its totient is φ = 204253283520.

The previous prime is 256735030883. The next prime is 256735030919. The reversal of 256735030885 is 588030537652.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4933798081 + 251801232804 = 70241^2 + 501798^2 .

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

It is not a de Polignac number, because 256735030885 - 2¹ = 256735030883 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 (256735030883) 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, 141841654 + ... + 141843463.

It is an arithmetic number, because the mean of its divisors is an integer number (38723018607).

Almost surely, 2^256735030885 is an apocalyptic number.

It is an amenable number.

256735030885 is a deficient number, since it is larger than the sum of its proper divisors (53049117971).

256735030885 is a wasteful number, since it uses less digits than its factorization.

256735030885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283685303.

The product of its (nonzero) digits is 6048000, while the sum is 52.

The spelling of 256735030885 in words is "two hundred fifty-six billion, seven hundred thirty-five million, thirty thousand, eight hundred eighty-five".