2161542512 has 10 divisors (see below), whose sum is σ = 4187988648. Its totient is φ = 1080771248.

The previous prime is 2161542497. The next prime is 2161542517. The reversal of 2161542512 is 2152451612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161542517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67548188 + ... + 67548219.

Almost surely, 2^2161542512 is an apocalyptic number.

It is an amenable number.

2161542512 is a deficient number, since it is larger than the sum of its proper divisors (2026446136).

2161542512 is a wasteful number, since it uses less digits than its factorization.

2161542512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135096415 (or 135096409 counting only the distinct ones).

The product of its digits is 4800, while the sum is 29.

The square root of 2161542512 is about 46492.3919797637. The cubic root of 2161542512 is about 1292.9684483344.

The spelling of 2161542512 in words is "two billion, one hundred sixty-one million, five hundred forty-two thousand, five hundred twelve".