26939409564 has 12 divisors (see below), whose sum is σ = 62858622344. Its totient is φ = 8979803184.

The previous prime is 26939409509. The next prime is 26939409589. The reversal of 26939409564 is 46590493962.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1122475387 + ... + 1122475410.

Almost surely, 2^26939409564 is an apocalyptic number.

It is an amenable number.

26939409564 is an abundant number, since it is smaller than the sum of its proper divisors (35919212780).

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

26939409564 is a wasteful number, since it uses less digits than its factorization.

26939409564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244950804 (or 2244950802 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 57.

The spelling of 26939409564 in words is "twenty-six billion, nine hundred thirty-nine million, four hundred nine thousand, five hundred sixty-four".