2165936573951 has 16 divisors (see below), whose sum is σ = 2263133107200. Its totient is φ = 2070804810528.

The previous prime is 2165936573929. The next prime is 2165936574037. The reversal of 2165936573951 is 1593756395612.

It is a cyclic number.

It is not a de Polignac number, because 2165936573951 - 2¹⁴ = 2165936557567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165936573921) 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, 4993910 + ... + 5410268.

It is an arithmetic number, because the mean of its divisors is an integer number (141445819200).

Almost surely, 2^{2165936573951} is an apocalyptic number.

2165936573951 is a deficient number, since it is larger than the sum of its proper divisors (97196533249).

2165936573951 is a wasteful number, since it uses less digits than its factorization.

2165936573951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418838.

The product of its digits is 45927000, while the sum is 62.

The spelling of 2165936573951 in words is "two trillion, one hundred sixty-five billion, nine hundred thirty-six million, five hundred seventy-three thousand, nine hundred fifty-one".