4991393456 has 20 divisors (see below), whose sum is σ = 11052371472. Its totient is φ = 2139168576.

The previous prime is 4991393447. The next prime is 4991393479. The reversal of 4991393456 is 6543931994.

It is a junction number, because it is equal to n+sod(n) for n = 4991393398 and 4991393407.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22282895 + ... + 22283118.

Almost surely, 2^4991393456 is an apocalyptic number.

It is an amenable number.

4991393456 is an abundant number, since it is smaller than the sum of its proper divisors (6060978016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4991393456 is a wasteful number, since it uses less digits than its factorization.

4991393456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44566028 (or 44566022 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 53.

The square root of 4991393456 is about 70649.7944512226. The cubic root of 4991393456 is about 1708.9942509790.

The spelling of 4991393456 in words is "four billion, nine hundred ninety-one million, three hundred ninety-three thousand, four hundred fifty-six".