26400138764 has 6 divisors (see below), whose sum is σ = 46200242844. Its totient is φ = 13200069380.

The previous prime is 26400138757. The next prime is 26400138767. The reversal of 26400138764 is 46783100462.

It is not an unprimeable number, because it can be changed into a prime (26400138767) by changing a digit.

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 as a sum of consecutive naturals, namely, 3300017342 + ... + 3300017349.

It is an arithmetic number, because the mean of its divisors is an integer number (7700040474).

Almost surely, 2^26400138764 is an apocalyptic number.

It is an amenable number.

26400138764 is a deficient number, since it is larger than the sum of its proper divisors (19800104080).

26400138764 is a wasteful number, since it uses less digits than its factorization.

26400138764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6600034695 (or 6600034693 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 26400138764 in words is "twenty-six billion, four hundred million, one hundred thirty-eight thousand, seven hundred sixty-four".