26256797664 has 48 divisors (see below), whose sum is σ = 71300794320. Its totient is φ = 8450462720.

The previous prime is 26256797657. The next prime is 26256797669. The reversal of 26256797664 is 46679765262.

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

It is a junction number, because it is equal to n+sod(n) for n = 26256797598 and 26256797607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26256797669) 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, 4712877 + ... + 4718444.

It is an arithmetic number, because the mean of its divisors is an integer number (1485433215).

Almost surely, 2^26256797664 is an apocalyptic number.

26256797664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

26256797664 is an abundant number, since it is smaller than the sum of its proper divisors (45043996656).

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

26256797664 is a wasteful number, since it uses less digits than its factorization.

26256797664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9431363 (or 9431355 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 60.

The spelling of 26256797664 in words is "twenty-six billion, two hundred fifty-six million, seven hundred ninety-seven thousand, six hundred sixty-four".