80456905 has 8 divisors (see below), whose sum is σ = 97486272. Its totient is φ = 63740208.

The previous prime is 80456897. The next prime is 80456923. The reversal of 80456905 is 50965408.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80456905 - 2³ = 80456897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77599 + ... + 78628.

It is an arithmetic number, because the mean of its divisors is an integer number (12185784).

Almost surely, 2^80456905 is an apocalyptic number.

It is an amenable number.

80456905 is a deficient number, since it is larger than the sum of its proper divisors (17029367).

80456905 is a wasteful number, since it uses less digits than its factorization.

80456905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156335.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 80456905 is about 8969.7773105022. Note that the first 3 decimals coincide. The cubic root of 80456905 is about 431.7056912455.

The spelling of 80456905 in words is "eighty million, four hundred fifty-six thousand, nine hundred five".