26514560644 has 24 divisors (see below), whose sum is σ = 54512454528. Its totient is φ = 11124990240.

The previous prime is 26514560593. The next prime is 26514560651. The reversal of 26514560644 is 44606541562.

It is a super-2 number, since 2×26514560644² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26514560644.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23176492 + ... + 23177635.

It is an arithmetic number, because the mean of its divisors is an integer number (2271352272).

Almost surely, 2^26514560644 is an apocalyptic number.

It is an amenable number.

26514560644 is an abundant number, since it is smaller than the sum of its proper divisors (27997893884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26514560644 is a wasteful number, since it uses less digits than its factorization.

26514560644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46354155 (or 46354153 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 26514560644 in words is "twenty-six billion, five hundred fourteen million, five hundred sixty thousand, six hundred forty-four".