80021153664 has 256 divisors, whose sum is σ = 241514784000. Its totient is φ = 26074294272.

The previous prime is 80021153617. The next prime is 80021153669. The reversal of 80021153664 is 46635112008.

It is a happy number.

80021153664 is a `hidden beast` number, since 80 + 0 + 211 + 5 + 366 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80021153669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63558667 + ... + 63559925.

It is an arithmetic number, because the mean of its divisors is an integer number (943417125).

Almost surely, 2^80021153664 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 80021153664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120757392000).

80021153664 is an abundant number, since it is smaller than the sum of its proper divisors (161493630336).

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

80021153664 is a wasteful number, since it uses less digits than its factorization.

80021153664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1682 (or 1664 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 80021153664 in words is "eighty billion, twenty-one million, one hundred fifty-three thousand, six hundred sixty-four".