26638613264 has 10 divisors (see below), whose sum is σ = 51612313230. Its totient is φ = 13319306624.

The previous prime is 26638613251. The next prime is 26638613299. The reversal of 26638613264 is 46231683662.

It can be written as a sum of positive squares in only one way, i.e., 21847204864 + 4791408400 = 147808^2 + 69220^2 .

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 as a sum of consecutive naturals, namely, 832456649 + ... + 832456680.

It is an arithmetic number, because the mean of its divisors is an integer number (5161231323).

Almost surely, 2^26638613264 is an apocalyptic number.

It is an amenable number.

26638613264 is a deficient number, since it is larger than the sum of its proper divisors (24973699966).

26638613264 is a wasteful number, since it uses less digits than its factorization.

26638613264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664913337 (or 1664913331 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 47.

The spelling of 26638613264 in words is "twenty-six billion, six hundred thirty-eight million, six hundred thirteen thousand, two hundred sixty-four".