2161541624 has 16 divisors (see below), whose sum is σ = 4421335320. Its totient is φ = 982518880.

The previous prime is 2161541581. The next prime is 2161541671. The reversal of 2161541624 is 4261451612.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 12281399 + ... + 12281574.

Almost surely, 2^2161541624 is an apocalyptic number.

It is an amenable number.

2161541624 is an abundant number, since it is smaller than the sum of its proper divisors (2259793696).

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

2161541624 is a wasteful number, since it uses less digits than its factorization.

2161541624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24562990 (or 24562986 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 2161541624 is about 46492.3824298132. The cubic root of 2161541624 is about 1292.9682712763.

The spelling of 2161541624 in words is "two billion, one hundred sixty-one million, five hundred forty-one thousand, six hundred twenty-four".