26397506888 has 8 divisors (see below), whose sum is σ = 49495325430. Its totient is φ = 13198753440.

The previous prime is 26397506879. The next prime is 26397506917. The reversal of 26397506888 is 88860579362.

It can be written as a sum of positive squares in only one way, i.e., 22637609764 + 3759897124 = 150458^2 + 61318^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 26397506888.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1649844173 + ... + 1649844188.

Almost surely, 2^26397506888 is an apocalyptic number.

It is an amenable number.

26397506888 is a deficient number, since it is larger than the sum of its proper divisors (23097818542).

26397506888 is a wasteful number, since it uses less digits than its factorization.

26397506888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3299688367 (or 3299688363 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 62.

The spelling of 26397506888 in words is "twenty-six billion, three hundred ninety-seven million, five hundred six thousand, eight hundred eighty-eight".