26401145564 has 24 divisors (see below), whose sum is σ = 47067095040. Its totient is φ = 12955406256.

The previous prime is 26401145557. The next prime is 26401145579. The reversal of 26401145564 is 46554110462.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197372 + ... + 302915.

It is an arithmetic number, because the mean of its divisors is an integer number (1961128960).

Almost surely, 2^26401145564 is an apocalyptic number.

It is an amenable number.

26401145564 is a deficient number, since it is larger than the sum of its proper divisors (20665949476).

26401145564 is a wasteful number, since it uses less digits than its factorization.

26401145564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500537 (or 500535 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 26401145564 in words is "twenty-six billion, four hundred one million, one hundred forty-five thousand, five hundred sixty-four".