26256663984 has 20 divisors (see below), whose sum is σ = 67829715416. Its totient is φ = 8752221312.

The previous prime is 26256663971. The next prime is 26256663997. The reversal of 26256663984 is 48936665262.

It is an interprime number because it is at equal distance from previous prime (26256663971) and next prime (26256663997).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273506869 + ... + 273506964.

Almost surely, 2^26256663984 is an apocalyptic number.

26256663984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

26256663984 is an abundant number, since it is smaller than the sum of its proper divisors (41573051432).

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

26256663984 is a wasteful number, since it uses less digits than its factorization.

26256663984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547013844 (or 547013838 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 57.

The spelling of 26256663984 in words is "twenty-six billion, two hundred fifty-six million, six hundred sixty-three thousand, nine hundred eighty-four".