26521645745 has 16 divisors (see below), whose sum is σ = 37146428928. Its totient is φ = 17799328320.

The previous prime is 26521645739. The next prime is 26521645831. The reversal of 26521645745 is 54754612562.

It is not a de Polignac number, because 26521645745 - 2⁸ = 26521645489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a self number, because there is not a number n which added to its sum of digits gives 26521645745.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8059646 + ... + 8062935.

It is an arithmetic number, because the mean of its divisors is an integer number (2321651808).

Almost surely, 2^26521645745 is an apocalyptic number.

It is an amenable number.

26521645745 is a deficient number, since it is larger than the sum of its proper divisors (10624783183).

26521645745 is a wasteful number, since it uses less digits than its factorization.

26521645745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16122640.

The product of its digits is 2016000, while the sum is 47.

The spelling of 26521645745 in words is "twenty-six billion, five hundred twenty-one million, six hundred forty-five thousand, seven hundred forty-five".