80971515558 has 12 divisors (see below), whose sum is σ = 175438283748. Its totient is φ = 26990505180.

The previous prime is 80971515487. The next prime is 80971515577. The reversal of 80971515558 is 85551517908.

80971515558 is a `hidden beast` number, since 8 + 0 + 9 + 71 + 5 + 15 + 558 = 666.

It is a super-3 number, since 3×80971515558³ (a number of 34 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2249208748 + ... + 2249208783.

It is an arithmetic number, because the mean of its divisors is an integer number (14619856979).

Almost surely, 2^80971515558 is an apocalyptic number.

80971515558 is an abundant number, since it is smaller than the sum of its proper divisors (94466768190).

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

80971515558 is a wasteful number, since it uses less digits than its factorization.

80971515558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4498417539 (or 4498417536 counting only the distinct ones).

The product of its (nonzero) digits is 2520000, while the sum is 54.

The spelling of 80971515558 in words is "eighty billion, nine hundred seventy-one million, five hundred fifteen thousand, five hundred fifty-eight".