80615515680 has 480 divisors, whose sum is σ = 327756312576. Its totient is φ = 18278701056.

The previous prime is 80615515613. The next prime is 80615515693. The reversal of 80615515680 is 8651551608.

80615515680 is a `hidden beast` number, since 80 + 6 + 1 + 5 + 5 + 1 + 568 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a super-2 number, since 2×80615515680² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 11517942 + ... + 11524938.

Almost surely, 2^80615515680 is an apocalyptic number.

80615515680 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 80615515680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163878156288).

80615515680 is an abundant number, since it is smaller than the sum of its proper divisors (247140796896).

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

80615515680 is a wasteful number, since it uses less digits than its factorization.

80615515680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7158 (or 7141 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 45.

The spelling of 80615515680 in words is "eighty billion, six hundred fifteen million, five hundred fifteen thousand, six hundred eighty".