791815081 has 4 divisors (see below), whose sum is σ = 793619200. Its totient is φ = 790010964.

The previous prime is 791815061. The next prime is 791815097. The reversal of 791815081 is 180518197.

791815081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 791815081 - 2¹⁹ = 791290793 is a prime.

It is a super-2 number, since 2×791815081² = 1253942244998073122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (791815021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 901401 + ... + 902278.

It is an arithmetic number, because the mean of its divisors is an integer number (198404800).

Almost surely, 2^791815081 is an apocalyptic number.

It is an amenable number.

791815081 is a deficient number, since it is larger than the sum of its proper divisors (1804119).

791815081 is a wasteful number, since it uses less digits than its factorization.

791815081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804118.

The product of its (nonzero) digits is 20160, while the sum is 40.

The square root of 791815081 is about 28139.2089618738. The cubic root of 791815081 is about 925.1409888819.

The spelling of 791815081 in words is "seven hundred ninety-one million, eight hundred fifteen thousand, eighty-one".