2191911364 has 24 divisors (see below), whose sum is σ = 4123647360. Its totient is φ = 1016181216.

The previous prime is 2191911349. The next prime is 2191911409. The reversal of 2191911364 is 4631191912.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303247 + ... + 310390.

It is an arithmetic number, because the mean of its divisors is an integer number (171818640).

Almost surely, 2^2191911364 is an apocalyptic number.

It is an amenable number.

2191911364 is a deficient number, since it is larger than the sum of its proper divisors (1931735996).

2191911364 is a wasteful number, since it uses less digits than its factorization.

2191911364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613707 (or 613705 counting only the distinct ones).

The product of its digits is 11664, while the sum is 37.

The square root of 2191911364 is about 46817.8530477424. The cubic root of 2191911364 is about 1298.9955483656.

The spelling of 2191911364 in words is "two billion, one hundred ninety-one million, nine hundred eleven thousand, three hundred sixty-four".