80999307970560 has 768 divisors, whose sum is σ = 335775585600000. Its totient is φ = 18514105860096.

The previous prime is 80999307970547. The next prime is 80999307970591. The reversal of 80999307970560 is 6507970399908.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (768).

It is a Harshad number since it is a multiple of its sum of digits (72).

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, 94405576 + ... + 95259704.

It is an arithmetic number, because the mean of its divisors is an integer number (437207793750).

Almost surely, 2^{80999307970560} is an apocalyptic number.

80999307970560 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 80999307970560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167887792800000).

80999307970560 is an abundant number, since it is smaller than the sum of its proper divisors (254776277629440).

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

80999307970560 is an equidigital number, since it uses as much as digits as its factorization.

80999307970560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854186 (or 854146 counting only the distinct ones).

The product of its (nonzero) digits is 231472080, while the sum is 72.

The spelling of 80999307970560 in words is "eighty trillion, nine hundred ninety-nine billion, three hundred seven million, nine hundred seventy thousand, five hundred sixty".