2161979242983 has 96 divisors (see below), whose sum is σ = 3853690214400. Its totient is φ = 1165056520320.

The previous prime is 2161979242963. The next prime is 2161979242999. The reversal of 2161979242983 is 3892429791612.

2161979242983 is a `hidden beast` number, since 2 + 1 + 61 + 9 + 79 + 2 + 429 + 83 = 666.

It is not a de Polignac number, because 2161979242983 - 2²⁰ = 2161978194407 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 2161979242983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161979242963) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4826635 + ... + 5255507.

It is an arithmetic number, because the mean of its divisors is an integer number (40142606400).

Almost surely, 2^{2161979242983} is an apocalyptic number.

2161979242983 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2161979242983 is a deficient number, since it is larger than the sum of its proper divisors (1691710971417).

2161979242983 is a wasteful number, since it uses less digits than its factorization.

2161979242983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428994 (or 428977 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The spelling of 2161979242983 in words is "two trillion, one hundred sixty-one billion, nine hundred seventy-nine million, two hundred forty-two thousand, nine hundred eighty-three".