2161372664775 has 12 divisors (see below), whose sum is σ = 3573469472552. Its totient is φ = 1152732087840.

The previous prime is 2161372664749. The next prime is 2161372664791. The reversal of 2161372664775 is 5774662731612.

It is not a de Polignac number, because 2161372664775 - 2¹² = 2161372660679 is a prime.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14409151024 + ... + 14409151173.

Almost surely, 2^{2161372664775} is an apocalyptic number.

2161372664775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2161372664775 is a deficient number, since it is larger than the sum of its proper divisors (1412096807777).

2161372664775 is a wasteful number, since it uses less digits than its factorization.

2161372664775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28818302210 (or 28818302205 counting only the distinct ones).

The product of its digits is 17781120, while the sum is 57.

The spelling of 2161372664775 in words is "two trillion, one hundred sixty-one billion, three hundred seventy-two million, six hundred sixty-four thousand, seven hundred seventy-five".