80790561 has 8 divisors (see below), whose sum is σ = 119689760. Its totient is φ = 53860356.

The previous prime is 80790547. The next prime is 80790569. The reversal of 80790561 is 16509708.

80790561 is a `hidden beast` number, since 8 + 0 + 7 + 90 + 561 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-80790561 is a prime.

It is a super-2 number, since 2×80790561² = 13054229493389442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80790569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1496095 + ... + 1496148.

It is an arithmetic number, because the mean of its divisors is an integer number (14961220).

Almost surely, 2^80790561 is an apocalyptic number.

It is an amenable number.

80790561 is a deficient number, since it is larger than the sum of its proper divisors (38899199).

80790561 is a wasteful number, since it uses less digits than its factorization.

80790561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2992252 (or 2992246 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 80790561 is about 8988.3569688792. The cubic root of 80790561 is about 432.3016315522.

The spelling of 80790561 in words is "eighty million, seven hundred ninety thousand, five hundred sixty-one".