80021575920 has 320 divisors, whose sum is σ = 292715265024. Its totient is φ = 17828290560.

The previous prime is 80021575913. The next prime is 80021575927. The reversal of 80021575920 is 2957512008.

It is an interprime number because it is at equal distance from previous prime (80021575913) and next prime (80021575927).

It is a super-2 number, since 2×80021575920² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80021575927) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7991557 + ... + 8001563.

Almost surely, 2^80021575920 is an apocalyptic number.

80021575920 is a gapful number since it is divisible by the number (80) 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 80021575920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146357632512).

80021575920 is an abundant number, since it is smaller than the sum of its proper divisors (212693689104).

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

80021575920 is a wasteful number, since it uses less digits than its factorization.

80021575920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10280 (or 10274 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 39.

The spelling of 80021575920 in words is "eighty billion, twenty-one million, five hundred seventy-five thousand, nine hundred twenty".