2161552605 has 8 divisors (see below), whose sum is σ = 3458484192. Its totient is φ = 1152828048.

The previous prime is 2161552579. The next prime is 2161552619. The reversal of 2161552605 is 5062551612.

2161552605 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2161552605 - 2²¹ = 2159455453 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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, 72051739 + ... + 72051768.

It is an arithmetic number, because the mean of its divisors is an integer number (432310524).

Almost surely, 2^2161552605 is an apocalyptic number.

It is an amenable number.

2161552605 is a deficient number, since it is larger than the sum of its proper divisors (1296931587).

2161552605 is a wasteful number, since it uses less digits than its factorization.

2161552605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144103515.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 2161552605 is about 46492.5005242781. The cubic root of 2161552605 is about 1292.9704607723.

The spelling of 2161552605 in words is "two billion, one hundred sixty-one million, five hundred fifty-two thousand, six hundred five".