2165003642 has 16 divisors (see below), whose sum is σ = 3362367240. Its totient is φ = 1044278592.

The previous prime is 2165003609. The next prime is 2165003657. The reversal of 2165003642 is 2463005612.

It can be written as a sum of positive squares in 4 ways, for example, as 823173481 + 1341830161 = 28691^2 + 36631^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

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, 54968 + ... + 85740.

Almost surely, 2^2165003642 is an apocalyptic number.

2165003642 is a deficient number, since it is larger than the sum of its proper divisors (1197363598).

2165003642 is a wasteful number, since it uses less digits than its factorization.

2165003642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32017.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 2165003642 is about 46529.5996329218. The cubic root of 2165003642 is about 1293.6581942619.

The spelling of 2165003642 in words is "two billion, one hundred sixty-five million, three thousand, six hundred forty-two".