2164779942 has 32 divisors (see below), whose sum is σ = 4788625632. Its totient is φ = 648082944.

The previous prime is 2164779931. The next prime is 2164779959. The reversal of 2164779942 is 2499774612.

It is a congruent number.

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, 372163 + ... + 377934.

It is an arithmetic number, because the mean of its divisors is an integer number (149644551).

Almost surely, 2^2164779942 is an apocalyptic number.

2164779942 is an abundant number, since it is smaller than the sum of its proper divisors (2623845690).

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

2164779942 is a wasteful number, since it uses less digits than its factorization.

2164779942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750152.

The product of its digits is 1524096, while the sum is 51.

The square root of 2164779942 is about 46527.1957246512. The cubic root of 2164779942 is about 1293.6136367840.

The spelling of 2164779942 in words is "two billion, one hundred sixty-four million, seven hundred seventy-nine thousand, nine hundred forty-two".