80990257920 has 576 divisors, whose sum is σ = 307717691904. Its totient is φ = 17895260160.

The previous prime is 80990257883. The next prime is 80990257951. The reversal of 80990257920 is 2975209908.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 45576072 + ... + 45577848.

It is an arithmetic number, because the mean of its divisors is an integer number (534232104).

Almost surely, 2^80990257920 is an apocalyptic number.

80990257920 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 80990257920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153858845952).

80990257920 is an abundant number, since it is smaller than the sum of its proper divisors (226727433984).

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

80990257920 is a wasteful number, since it uses less digits than its factorization.

80990257920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908 (or 1894 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 51.

The spelling of 80990257920 in words is "eighty billion, nine hundred ninety million, two hundred fifty-seven thousand, nine hundred twenty".