2161663752 has 16 divisors (see below), whose sum is σ = 5404159440. Its totient is φ = 720554576.

The previous prime is 2161663733. The next prime is 2161663769. The reversal of 2161663752 is 2573661612.

It is a self number, because there is not a number n which added to its sum of digits gives 2161663752.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45034638 + ... + 45034685.

It is an arithmetic number, because the mean of its divisors is an integer number (337759965).

Almost surely, 2^2161663752 is an apocalyptic number.

It is an amenable number.

2161663752 is an abundant number, since it is smaller than the sum of its proper divisors (3242495688).

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

2161663752 is a wasteful number, since it uses less digits than its factorization.

2161663752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90069332 (or 90069328 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 2161663752 is about 46493.6958307253. The cubic root of 2161663752 is about 1292.9926218992.

The spelling of 2161663752 in words is "two billion, one hundred sixty-one million, six hundred sixty-three thousand, seven hundred fifty-two".