80791569 has 6 divisors (see below), whose sum is σ = 116698946. Its totient is φ = 53861040.

The previous prime is 80791559. The next prime is 80791573. The reversal of 80791569 is 96519708.

80791569 is a `hidden beast` number, since 80 + 7 + 9 + 1 + 569 = 666.

It can be written as a sum of positive squares in only one way, i.e., 79869969 + 921600 = 8937^2 + 960^2 .

It is not a de Polignac number, because 80791569 - 2¹¹ = 80789521 is a prime.

It is a super-2 number, since 2×80791569² = 13054555242963522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80791559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4488412 + ... + 4488429.

Almost surely, 2^80791569 is an apocalyptic number.

It is an amenable number.

80791569 is a deficient number, since it is larger than the sum of its proper divisors (35907377).

80791569 is a wasteful number, since it uses less digits than its factorization.

80791569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8976847 (or 8976844 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 80791569 is about 8988.4130412437. The cubic root of 80791569 is about 432.3034294447.

The spelling of 80791569 in words is "eighty million, seven hundred ninety-one thousand, five hundred sixty-nine".