26640934580 has 48 divisors (see below), whose sum is σ = 61012197120. Its totient is φ = 9712130688.

The previous prime is 26640934561. The next prime is 26640934627. The reversal of 26640934580 is 8543904662.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 627974 + ... + 669053.

It is an arithmetic number, because the mean of its divisors is an integer number (1271087440).

Almost surely, 2^26640934580 is an apocalyptic number.

26640934580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26640934580 is an abundant number, since it is smaller than the sum of its proper divisors (34371262540).

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

26640934580 is a wasteful number, since it uses less digits than its factorization.

26640934580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297128 (or 1297126 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 47.

The spelling of 26640934580 in words is "twenty-six billion, six hundred forty million, nine hundred thirty-four thousand, five hundred eighty".