8199191078 has 64 divisors (see below), whose sum is σ = 13856209920. Its totient is φ = 3614637312.

The previous prime is 8199191053. The next prime is 8199191081. The reversal of 8199191078 is 8701919918.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9544613 + ... + 9545471.

It is an arithmetic number, because the mean of its divisors is an integer number (216503280).

Almost surely, 2^8199191078 is an apocalyptic number.

8199191078 is a deficient number, since it is larger than the sum of its proper divisors (5657018842).

8199191078 is a wasteful number, since it uses less digits than its factorization.

8199191078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101.

The product of its (nonzero) digits is 326592, while the sum is 53.

The square root of 8199191078 is about 90549.3847466674. The cubic root of 8199191078 is about 2016.4633634758.

The spelling of 8199191078 in words is "eight billion, one hundred ninety-nine million, one hundred ninety-one thousand, seventy-eight".