26402669856 has 72 divisors (see below), whose sum is σ = 75098725884. Its totient is φ = 8798999040.

The previous prime is 26402669849. The next prime is 26402669911. The reversal of 26402669856 is 65896620462.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20237907600 + 6164762256 = 142260^2 + 78516^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2165730 + ... + 2177886.

Almost surely, 2^26402669856 is an apocalyptic number.

It is an amenable number.

26402669856 is an abundant number, since it is smaller than the sum of its proper divisors (48696056028).

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

26402669856 is a wasteful number, since it uses less digits than its factorization.

26402669856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19714 (or 19703 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 54.

The spelling of 26402669856 in words is "twenty-six billion, four hundred two million, six hundred sixty-nine thousand, eight hundred fifty-six".