80705457 has 16 divisors (see below), whose sum is σ = 136644480. Its totient is φ = 46117296.

The previous prime is 80705447. The next prime is 80705479. The reversal of 80705457 is 75450708.

It is not a de Polignac number, because 80705457 - 2⁶ = 80705393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80705437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213318 + ... + 213695.

It is an arithmetic number, because the mean of its divisors is an integer number (8540280).

Almost surely, 2^80705457 is an apocalyptic number.

It is an amenable number.

80705457 is a deficient number, since it is larger than the sum of its proper divisors (55939023).

80705457 is a wasteful number, since it uses less digits than its factorization.

80705457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427029 (or 427023 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 80705457 is about 8983.6215971066. The cubic root of 80705457 is about 432.1497840944.

The spelling of 80705457 in words is "eighty million, seven hundred five thousand, four hundred fifty-seven".