2123688972585 has 32 divisors (see below), whose sum is σ = 3402751317120. Its totient is φ = 1131018710528.

The previous prime is 2123688972577. The next prime is 2123688972607. The reversal of 2123688972585 is 5852798863212.

It is a cyclic number.

It is not a de Polignac number, because 2123688972585 - 2³ = 2123688972577 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39842122 + ... + 39895388.

It is an arithmetic number, because the mean of its divisors is an integer number (106335978660).

Almost surely, 2^{2123688972585} is an apocalyptic number.

It is an amenable number.

2123688972585 is a deficient number, since it is larger than the sum of its proper divisors (1279062344535).

2123688972585 is a wasteful number, since it uses less digits than its factorization.

2123688972585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57017.

The product of its digits is 116121600, while the sum is 66.

The spelling of 2123688972585 in words is "two trillion, one hundred twenty-three billion, six hundred eighty-eight million, nine hundred seventy-two thousand, five hundred eighty-five".