80511972 has 12 divisors (see below), whose sum is σ = 187861296. Its totient is φ = 26837320.

The previous prime is 80511971. The next prime is 80511979. The reversal of 80511972 is 27911508.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (80511971) 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, 3354654 + ... + 3354677.

It is an arithmetic number, because the mean of its divisors is an integer number (15655108).

Almost surely, 2^80511972 is an apocalyptic number.

It is an amenable number.

80511972 is an abundant number, since it is smaller than the sum of its proper divisors (107349324).

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

80511972 is a wasteful number, since it uses less digits than its factorization.

80511972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6709338 (or 6709336 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 80511972 is about 8972.8463711355. The cubic root of 80511972 is about 431.8041593459.

The spelling of 80511972 in words is "eighty million, five hundred eleven thousand, nine hundred seventy-two".