256501273724045 has 16 divisors (see below), whose sum is σ = 351819225396480. Its totient is φ = 175863562694784.

The previous prime is 256501273724041. The next prime is 256501273724053. The reversal of 256501273724045 is 540427372105652.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 256501273724045 - 2² = 256501273724041 is a prime.

It is a super-2 number, since 2×256501273724045² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256501273724041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 479416352 + ... + 479951081.

It is an arithmetic number, because the mean of its divisors is an integer number (21988701587280).

Almost surely, 2^{256501273724045} is an apocalyptic number.

It is an amenable number.

256501273724045 is a deficient number, since it is larger than the sum of its proper divisors (95317951672435).

256501273724045 is an equidigital number, since it uses as much as digits as its factorization.

256501273724045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959375084.

The product of its (nonzero) digits is 14112000, while the sum is 53.

The spelling of 256501273724045 in words is "two hundred fifty-six trillion, five hundred one billion, two hundred seventy-three million, seven hundred twenty-four thousand, forty-five".