26686004256 has 48 divisors (see below), whose sum is σ = 77834181600. Its totient is φ = 8895334464.

The previous prime is 26686004251. The next prime is 26686004281. The reversal of 26686004256 is 65240068662.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×26686004256² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26686004251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15442426 + ... + 15444153.

It is an arithmetic number, because the mean of its divisors is an integer number (1621545450).

Almost surely, 2^26686004256 is an apocalyptic number.

It is an amenable number.

26686004256 is an abundant number, since it is smaller than the sum of its proper divisors (51148177344).

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

26686004256 is a wasteful number, since it uses less digits than its factorization.

26686004256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30886598 (or 30886584 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 26686004256 in words is "twenty-six billion, six hundred eighty-six million, four thousand, two hundred fifty-six".