2161018874 has 12 divisors (see below), whose sum is σ = 3770757594. Its totient is φ = 926150904.

The previous prime is 2161018861. The next prime is 2161018933. The reversal of 2161018874 is 4788101612.

It is a happy number.

2161018874 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1337730625 + 823288249 = 36575^2 + 28693^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11025509 + ... + 11025704.

Almost surely, 2^2161018874 is an apocalyptic number.

2161018874 is a deficient number, since it is larger than the sum of its proper divisors (1609738720).

2161018874 is a wasteful number, since it uses less digits than its factorization.

2161018874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22051229 (or 22051222 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 38.

The square root of 2161018874 is about 46486.7602011584. The cubic root of 2161018874 is about 1292.8640318374.

The spelling of 2161018874 in words is "two billion, one hundred sixty-one million, eighteen thousand, eight hundred seventy-four".