26656263680 has 160 divisors (see below), whose sum is σ = 64939843584. Its totient is φ = 10492747776.

The previous prime is 26656263679. The next prime is 26656263691. The reversal of 26656263680 is 8636265662.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52994309 + ... + 52994811.

Almost surely, 2^26656263680 is an apocalyptic number.

26656263680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26656263680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32469921792).

26656263680 is an abundant number, since it is smaller than the sum of its proper divisors (38283579904).

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

26656263680 is a wasteful number, since it uses less digits than its factorization.

26656263680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816 (or 800 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 50.

The spelling of 26656263680 in words is "twenty-six billion, six hundred fifty-six million, two hundred sixty-three thousand, six hundred eighty".