26821880412 has 48 divisors (see below), whose sum is σ = 64757400960. Its totient is φ = 8630338752.

The previous prime is 26821880381. The next prime is 26821880447. The reversal of 26821880412 is 21408812862.

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, 2607303 + ... + 2617569.

It is an arithmetic number, because the mean of its divisors is an integer number (1349112520).

Almost surely, 2^26821880412 is an apocalyptic number.

It is an amenable number.

26821880412 is an abundant number, since it is smaller than the sum of its proper divisors (37935520548).

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

26821880412 is a wasteful number, since it uses less digits than its factorization.

26821880412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17810 (or 17808 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 42.

The spelling of 26821880412 in words is "twenty-six billion, eight hundred twenty-one million, eight hundred eighty thousand, four hundred twelve".