262640442645 has 24 divisors (see below), whose sum is σ = 520278210816. Its totient is φ = 120064202208.

The previous prime is 262640442643. The next prime is 262640442677. The reversal of 262640442645 is 546244046262.

It is not a de Polignac number, because 262640442645 - 2¹ = 262640442643 is a prime.

It is a super-2 number, since 2×262640442645² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 262640442645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (262640442643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 416889277 + ... + 416889906.

It is an arithmetic number, because the mean of its divisors is an integer number (21678258784).

Almost surely, 2^262640442645 is an apocalyptic number.

It is an amenable number.

262640442645 is a deficient number, since it is larger than the sum of its proper divisors (257637768171).

262640442645 is a wasteful number, since it uses less digits than its factorization.

262640442645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833779201 (or 833779198 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 45.

The spelling of 262640442645 in words is "two hundred sixty-two billion, six hundred forty million, four hundred forty-two thousand, six hundred forty-five".