2161979242963 has 2 divisors, whose sum is σ = 2161979242964. Its totient is φ = 2161979242962.

The previous prime is 2161979242961. The next prime is 2161979242999. The reversal of 2161979242963 is 3692429791612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2161979242963 - 2¹ = 2161979242961 is a prime.

Together with 2161979242961, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2161979242961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080989621481 + 1080989621482.

It is an arithmetic number, because the mean of its divisors is an integer number (1080989621482).

Almost surely, 2^{2161979242963} is an apocalyptic number.

2161979242963 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161979242963 is an equidigital number, since it uses as much as digits as its factorization.

2161979242963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17635968, while the sum is 61.

The spelling of 2161979242963 in words is "two trillion, one hundred sixty-one billion, nine hundred seventy-nine million, two hundred forty-two thousand, nine hundred sixty-three".