2161871602 has 16 divisors (see below), whose sum is σ = 3557159424. Its totient is φ = 977238000.

The previous prime is 2161871581. The next prime is 2161871603. The reversal of 2161871602 is 2061781612.

It is not an unprimeable number, because it can be changed into a prime (2161871603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267474 + ... + 275437.

It is an arithmetic number, because the mean of its divisors is an integer number (222322464).

Almost surely, 2^2161871602 is an apocalyptic number.

2161871602 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2161871602 is a deficient number, since it is larger than the sum of its proper divisors (1395287822).

2161871602 is a wasteful number, since it uses less digits than its factorization.

2161871602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543105.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 2161871602 is about 46495.9310262737. The cubic root of 2161871602 is about 1293.0340621869.

The spelling of 2161871602 in words is "two billion, one hundred sixty-one million, eight hundred seventy-one thousand, six hundred two".