80516001556 has 12 divisors (see below), whose sum is σ = 144339661620. Its totient is φ = 39276098240.

The previous prime is 80516001523. The next prime is 80516001557. The reversal of 80516001556 is 65510061508.

It can be written as a sum of positive squares in 2 ways, for example, as 20760199056 + 59755802500 = 144084^2 + 244450^2 .

It is a super-2 number, since 2×80516001556² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80516001557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245475451 + ... + 245475778.

It is an arithmetic number, because the mean of its divisors is an integer number (12028305135).

Almost surely, 2^80516001556 is an apocalyptic number.

It is an amenable number.

80516001556 is a deficient number, since it is larger than the sum of its proper divisors (63823660064).

80516001556 is a wasteful number, since it uses less digits than its factorization.

80516001556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490951274 (or 490951272 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 37.

The spelling of 80516001556 in words is "eighty billion, five hundred sixteen million, one thousand, five hundred fifty-six".