2161501617 has 32 divisors (see below), whose sum is σ = 3328773120. Its totient is φ = 1233817920.

The previous prime is 2161501609. The next prime is 2161501637. The reversal of 2161501617 is 7161051612.

It is not a de Polignac number, because 2161501617 - 2³ = 2161501609 is a prime.

It is a super-2 number, since 2×2161501617² = 9344178480587229378, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2161501637) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98508 + ... + 118434.

It is an arithmetic number, because the mean of its divisors is an integer number (104024160).

Almost surely, 2^2161501617 is an apocalyptic number.

It is an amenable number.

2161501617 is a deficient number, since it is larger than the sum of its proper divisors (1167271503).

2161501617 is a wasteful number, since it uses less digits than its factorization.

2161501617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20133.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 2161501617 is about 46491.9521745431. The cubic root of 2161501617 is about 1292.9602942380.

The spelling of 2161501617 in words is "two billion, one hundred sixty-one million, five hundred one thousand, six hundred seventeen".