26779457672 has 48 divisors (see below), whose sum is σ = 58437707580. Its totient is φ = 11456445440.

The previous prime is 26779457647. The next prime is 26779457693. The reversal of 26779457672 is 27675497762.

It can be written as a sum of positive squares in 2 ways, for example, as 25251116836 + 1528340836 = 158906^2 + 39094^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 797213 + ... + 830124.

Almost surely, 2^26779457672 is an apocalyptic number.

26779457672 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

26779457672 is an abundant number, since it is smaller than the sum of its proper divisors (31658249908).

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

26779457672 is a wasteful number, since it uses less digits than its factorization.

26779457672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627382 (or 1627367 counting only the distinct ones).

The product of its digits is 62233920, while the sum is 62.

The spelling of 26779457672 in words is "twenty-six billion, seven hundred seventy-nine million, four hundred fifty-seven thousand, six hundred seventy-two".