653660856870 has 32 divisors (see below), whose sum is σ = 1792898350848. Its totient is φ = 149408195808.

The previous prime is 653660856767. The next prime is 653660856881. The reversal of 653660856870 is 78658066356.

It is a Curzon number.

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, 1556335164 + ... + 1556335583.

It is an arithmetic number, because the mean of its divisors is an integer number (56028073464).

Almost surely, 2^653660856870 is an apocalyptic number.

653660856870 is an abundant number, since it is smaller than the sum of its proper divisors (1139237493978).

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

653660856870 is a wasteful number, since it uses less digits than its factorization.

653660856870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3112670764.

The product of its (nonzero) digits is 43545600, while the sum is 60.

The spelling of 653660856870 in words is "six hundred fifty-three billion, six hundred sixty million, eight hundred fifty-six thousand, eight hundred seventy".