26640410620 has 24 divisors (see below), whose sum is σ = 56010178224. Its totient is φ = 10643723136.

The previous prime is 26640410569. The next prime is 26640410653. The reversal of 26640410620 is 2601404662.

It is a super-2 number, since 2×26640410620² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 760002 + ... + 794281.

It is an arithmetic number, because the mean of its divisors is an integer number (2333757426).

Almost surely, 2^26640410620 is an apocalyptic number.

26640410620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26640410620 is an abundant number, since it is smaller than the sum of its proper divisors (29369767604).

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

26640410620 is a wasteful number, since it uses less digits than its factorization.

26640410620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555149 (or 1555147 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 26640410620 in words is "twenty-six billion, six hundred forty million, four hundred ten thousand, six hundred twenty".