80999156 has 36 divisors (see below), whose sum is σ = 170222976. Its totient is φ = 33591600.

The previous prime is 80999141. The next prime is 80999161. The reversal of 80999156 is 65199908.

It is a self number, because there is not a number n which added to its sum of digits gives 80999156.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 590 + ... + 12741.

It is an arithmetic number, because the mean of its divisors is an integer number (4728416).

Almost surely, 2^80999156 is an apocalyptic number.

It is an amenable number.

80999156 is an abundant number, since it is smaller than the sum of its proper divisors (89223820).

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

80999156 is a wasteful number, since it uses less digits than its factorization.

80999156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13380 (or 13371 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 47.

The square root of 80999156 is about 8999.9531109890. The cubic root of 80999156 is about 432.6733682986.

The spelling of 80999156 in words is "eighty million, nine hundred ninety-nine thousand, one hundred fifty-six".