2565253956931 has 8 divisors (see below), whose sum is σ = 2582049461904. Its totient is φ = 2548471351680.

The previous prime is 2565253956901. The next prime is 2565253956943. The reversal of 2565253956931 is 1396593525652.

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 2565253956931 - 2¹³ = 2565253948739 is a prime.

It is a super-2 number, since 2×2565253956931² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2565253956931.

It is not an unprimeable number, because it can be changed into a prime (2565253956901) 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, 2825746 + ... + 3621511.

It is an arithmetic number, because the mean of its divisors is an integer number (322756182738).

Almost surely, 2^{2565253956931} is an apocalyptic number.

2565253956931 is a deficient number, since it is larger than the sum of its proper divisors (16795504973).

2565253956931 is a wasteful number, since it uses less digits than its factorization.

2565253956931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6449861.

The product of its digits is 65610000, while the sum is 61.

The spelling of 2565253956931 in words is "two trillion, five hundred sixty-five billion, two hundred fifty-three million, nine hundred fifty-six thousand, nine hundred thirty-one".