80472861 has 24 divisors (see below), whose sum is σ = 134169984. Its totient is φ = 45525600.

The previous prime is 80472857. The next prime is 80472863. The reversal of 80472861 is 16827408.

It is not a de Polignac number, because 80472861 - 2² = 80472857 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80472863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40 + ... + 12686.

It is an arithmetic number, because the mean of its divisors is an integer number (5590416).

Almost surely, 2^80472861 is an apocalyptic number.

It is an amenable number.

80472861 is a deficient number, since it is larger than the sum of its proper divisors (53697123).

80472861 is a wasteful number, since it uses less digits than its factorization.

80472861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12761 (or 12758 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 80472861 is about 8970.6666976318. Note that the first 4 decimals coincide. The cubic root of 80472861 is about 431.7342276018.

The spelling of 80472861 in words is "eighty million, four hundred seventy-two thousand, eight hundred sixty-one".