2164477906 has 12 divisors (see below), whose sum is σ = 3253562478. Its totient is φ = 1079961792.

The previous prime is 2164477873. The next prime is 2164477907. The reversal of 2164477906 is 6097744612.

It can be written as a sum of positive squares in only one way, i.e., 2161785025 + 2692881 = 46495^2 + 1641^2 .

It is not an unprimeable number, because it can be changed into a prime (2164477907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 596610 + ... + 600226.

Almost surely, 2^2164477906 is an apocalyptic number.

2164477906 is a deficient number, since it is larger than the sum of its proper divisors (1089084572).

2164477906 is an frugal number, since it uses more digits than its factorization.

2164477906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4713 (or 4166 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 46.

The square root of 2164477906 is about 46523.9498108232. The cubic root of 2164477906 is about 1293.5534711518.

The spelling of 2164477906 in words is "two billion, one hundred sixty-four million, four hundred seventy-seven thousand, nine hundred six".