8122457791 has 8 divisors (see below), whose sum is σ = 9283395744. Its totient is φ = 6961666560.

The previous prime is 8122457753. The next prime is 8122457821. The reversal of 8122457791 is 1977542218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8122457791 - 2⁹ = 8122457279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8122457191) 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, 136431 + ... + 186703.

It is an arithmetic number, because the mean of its divisors is an integer number (1160424468).

Almost surely, 2^8122457791 is an apocalyptic number.

8122457791 is a deficient number, since it is larger than the sum of its proper divisors (1160937953).

8122457791 is a wasteful number, since it uses less digits than its factorization.

8122457791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73361.

The product of its digits is 282240, while the sum is 46.

The square root of 8122457791 is about 90124.6791450599. The cubic root of 8122457791 is about 2010.1531851108.

The spelling of 8122457791 in words is "eight billion, one hundred twenty-two million, four hundred fifty-seven thousand, seven hundred ninety-one".