84157220664 has 192 divisors, whose sum is σ = 253945692000. Its totient is φ = 24960998400.

The previous prime is 84157220599. The next prime is 84157220701. The reversal of 84157220664 is 46602275148.

84157220664 is a `hidden beast` number, since 8 + 415 + 7 + 220 + 6 + 6 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19348762 + ... + 19353110.

Almost surely, 2^84157220664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84157220664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126972846000).

84157220664 is an abundant number, since it is smaller than the sum of its proper divisors (169788471336).

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

84157220664 is a wasteful number, since it uses less digits than its factorization.

84157220664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4886 (or 4879 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 84157220664 in words is "eighty-four billion, one hundred fifty-seven million, two hundred twenty thousand, six hundred sixty-four".