80605656 has 24 divisors (see below), whose sum is σ = 218307180. Its totient is φ = 26868528.

The previous prime is 80605649. The next prime is 80605663. The reversal of 80605656 is 65650608.

It is an interprime number because it is at equal distance from previous prime (80605649) and next prime (80605663).

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 80605656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 559690 + ... + 559833.

Almost surely, 2^80605656 is an apocalyptic number.

It is an amenable number.

80605656 is an abundant number, since it is smaller than the sum of its proper divisors (137701524).

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

80605656 is a wasteful number, since it uses less digits than its factorization.

80605656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119535 (or 1119528 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 80605656 is about 8978.0652704244. The cubic root of 80605656 is about 431.9715773481.

The spelling of 80605656 in words is "eighty million, six hundred five thousand, six hundred fifty-six".