68512033656 has 160 divisors (see below), whose sum is σ = 218444688000. Its totient is φ = 19858512960.

The previous prime is 68512033643. The next prime is 68512033661. The reversal of 68512033656 is 65633021586.

68512033656 is a `hidden beast` number, since 6 + 85 + 1 + 203 + 365 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 45006 + ... + 372893.

It is an arithmetic number, because the mean of its divisors is an integer number (1365279300).

Almost surely, 2^68512033656 is an apocalyptic number.

68512033656 is a gapful number since it is divisible by the number (66) 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 68512033656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109222344000).

68512033656 is an abundant number, since it is smaller than the sum of its proper divisors (149932654344).

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

68512033656 is a wasteful number, since it uses less digits than its factorization.

68512033656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417951 (or 417938 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 68512033656 in words is "sixty-eight billion, five hundred twelve million, thirty-three thousand, six hundred fifty-six".