2161571862515 has 16 divisors (see below), whose sum is σ = 2793449382528. Its totient is φ = 1596218576256.

The previous prime is 2161571862491. The next prime is 2161571862563. The reversal of 2161571862515 is 5152681751612.

It is a cyclic number.

It is not a de Polignac number, because 2161571862515 - 2²⁰ = 2161570813939 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7614662 + ... + 7893428.

It is an arithmetic number, because the mean of its divisors is an integer number (174590586408).

Almost surely, 2^{2161571862515} is an apocalyptic number.

2161571862515 is a deficient number, since it is larger than the sum of its proper divisors (631877520013).

2161571862515 is a wasteful number, since it uses less digits than its factorization.

2161571862515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398078.

The product of its digits is 1008000, while the sum is 50.

The spelling of 2161571862515 in words is "two trillion, one hundred sixty-one billion, five hundred seventy-one million, eight hundred sixty-two thousand, five hundred fifteen".