22640648455208 has 64 divisors (see below), whose sum is σ = 49004862374400. Its totient is φ = 9605753763840.

The previous prime is 22640648455181. The next prime is 22640648455273. The reversal of 22640648455208 is 80255484604622.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (56).

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, 2368553 + ... + 7133816.

It is an arithmetic number, because the mean of its divisors is an integer number (765700974600).

Almost surely, 2^{22640648455208} is an apocalyptic number.

22640648455208 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22640648455208 is an abundant number, since it is smaller than the sum of its proper divisors (26364213919192).

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

22640648455208 is a wasteful number, since it uses less digits than its factorization.

22640648455208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9502810 (or 9502806 counting only the distinct ones).

The product of its (nonzero) digits is 29491200, while the sum is 56.

The spelling of 22640648455208 in words is "twenty-two trillion, six hundred forty billion, six hundred forty-eight million, four hundred fifty-five thousand, two hundred eight".