9051991916 has 48 divisors (see below), whose sum is σ = 17486085120. Its totient is φ = 4066009920.

The previous prime is 9051991889. The next prime is 9051991933. The reversal of 9051991916 is 6191991509.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1360550 + ... + 1367186.

It is an arithmetic number, because the mean of its divisors is an integer number (364293440).

Almost surely, 2^9051991916 is an apocalyptic number.

It is an amenable number.

9051991916 is a deficient number, since it is larger than the sum of its proper divisors (8434093204).

9051991916 is a wasteful number, since it uses less digits than its factorization.

9051991916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7014 (or 7012 counting only the distinct ones).

The product of its (nonzero) digits is 196830, while the sum is 50.

The square root of 9051991916 is about 95141.9566542543. The cubic root of 9051991916 is about 2084.0815992526.

The spelling of 9051991916 in words is "nine billion, fifty-one million, nine hundred ninety-one thousand, nine hundred sixteen".