26628924680 has 16 divisors (see below), whose sum is σ = 59915080620. Its totient is φ = 10651569856.

The previous prime is 26628924677. The next prime is 26628924691. The reversal of 26628924680 is 8642982662.

It can be written as a sum of positive squares in 2 ways, for example, as 25925508196 + 703416484 = 161014^2 + 26522^2 .

It is a super-2 number, since 2×26628924680² (a number of 22 digits) contains 22 as substring.

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, 332861519 + ... + 332861598.

Almost surely, 2^26628924680 is an apocalyptic number.

26628924680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26628924680 is an abundant number, since it is smaller than the sum of its proper divisors (33286155940).

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

26628924680 is a wasteful number, since it uses less digits than its factorization.

26628924680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665723128 (or 665723124 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 53.

The spelling of 26628924680 in words is "twenty-six billion, six hundred twenty-eight million, nine hundred twenty-four thousand, six hundred eighty".