2161501604162 has 8 divisors (see below), whose sum is σ = 3432973136076. Its totient is φ = 1017177225472.

The previous prime is 2161501604149. The next prime is 2161501604173. The reversal of 2161501604162 is 2614061051612.

It can be written as a sum of positive squares in 2 ways, for example, as 1971387291721 + 190114312441 = 1404061^2 + 436021^2 .

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

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, 31786788263 + ... + 31786788330.

Almost surely, 2^{2161501604162} is an apocalyptic number.

2161501604162 is a deficient number, since it is larger than the sum of its proper divisors (1271471531914).

2161501604162 is a wasteful number, since it uses less digits than its factorization.

2161501604162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63573576612.

The product of its (nonzero) digits is 17280, while the sum is 35.

Adding to 2161501604162 its reverse (2614061051612), we get a palindrome (4775562655774).

The spelling of 2161501604162 in words is "two trillion, one hundred sixty-one billion, five hundred one million, six hundred four thousand, one hundred sixty-two".