2177327864 has 16 divisors (see below), whose sum is σ = 4085008200. Its totient is φ = 1087992352.

The previous prime is 2177327861. The next prime is 2177327881. The reversal of 2177327864 is 4687237712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2177327861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70034 + ... + 96225.

Almost surely, 2^2177327864 is an apocalyptic number.

It is an amenable number.

2177327864 is a deficient number, since it is larger than the sum of its proper divisors (1907680336).

2177327864 is a wasteful number, since it uses less digits than its factorization.

2177327864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167902 (or 167898 counting only the distinct ones).

The product of its digits is 790272, while the sum is 47.

The square root of 2177327864 is about 46661.8459129083. The cubic root of 2177327864 is about 1296.1082553858.

The spelling of 2177327864 in words is "two billion, one hundred seventy-seven million, three hundred twenty-seven thousand, eight hundred sixty-four".