26615622660 has 192 divisors, whose sum is σ = 82791072000. Its totient is φ = 6334873600.

The previous prime is 26615622643. The next prime is 26615622673. The reversal of 26615622660 is 6622651662.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8750740 + ... + 8753780.

It is an arithmetic number, because the mean of its divisors is an integer number (431203500).

Almost surely, 2^26615622660 is an apocalyptic number.

26615622660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26615622660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41395536000).

26615622660 is an abundant number, since it is smaller than the sum of its proper divisors (56175449340).

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

26615622660 is a wasteful number, since it uses less digits than its factorization.

26615622660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3302 (or 3300 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 26615622660 in words is "twenty-six billion, six hundred fifteen million, six hundred twenty-two thousand, six hundred sixty".