2120615617 has 16 divisors (see below), whose sum is σ = 2248202880. Its totient is φ = 1996106112.

The previous prime is 2120615579. The next prime is 2120615641. The reversal of 2120615617 is 7165160212.

It is a cyclic number.

It is not a de Polignac number, because 2120615617 - 2²³ = 2112227009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120615677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 917259 + ... + 919567.

It is an arithmetic number, because the mean of its divisors is an integer number (140512680).

Almost surely, 2^2120615617 is an apocalyptic number.

It is an amenable number.

2120615617 is a deficient number, since it is larger than the sum of its proper divisors (127587263).

2120615617 is a wasteful number, since it uses less digits than its factorization.

2120615617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2952.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 2120615617 is about 46050.1424210610. The cubic root of 2120615617 is about 1284.7559917612.

Adding to 2120615617 its reverse (7165160212), we get a palindrome (9285775829).

The spelling of 2120615617 in words is "two billion, one hundred twenty million, six hundred fifteen thousand, six hundred seventeen".