256305460015 has 48 divisors (see below), whose sum is σ = 355967668224. Its totient is φ = 175513910400.

The previous prime is 256305460013. The next prime is 256305460057. The reversal of 256305460015 is 510064503652.

It is not a de Polignac number, because 256305460015 - 2¹ = 256305460013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256305460013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2279242 + ... + 2389048.

It is an arithmetic number, because the mean of its divisors is an integer number (7415993088).

Almost surely, 2^256305460015 is an apocalyptic number.

256305460015 is a deficient number, since it is larger than the sum of its proper divisors (99662208209).

256305460015 is a wasteful number, since it uses less digits than its factorization.

256305460015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109928 (or 109891 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

Adding to 256305460015 its reverse (510064503652), we get a palindrome (766369963667).

The spelling of 256305460015 in words is "two hundred fifty-six billion, three hundred five million, four hundred sixty thousand, fifteen".