2161503390929 has 2 divisors, whose sum is σ = 2161503390930. Its totient is φ = 2161503390928.

The previous prime is 2161503390863. The next prime is 2161503390931. The reversal of 2161503390929 is 9290933051612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1784842560400 + 376660830529 = 1335980^2 + 613727^2 .

It is a cyclic number.

It is not a de Polignac number, because 2161503390929 - 2¹⁶ = 2161503325393 is a prime.

Together with 2161503390931, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2161503395929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080751695464 + 1080751695465.

It is an arithmetic number, because the mean of its divisors is an integer number (1080751695465).

Almost surely, 2^{2161503390929} is an apocalyptic number.

It is an amenable number.

2161503390929 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161503390929 is an equidigital number, since it uses as much as digits as its factorization.

2161503390929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 787320, while the sum is 50.

The spelling of 2161503390929 in words is "two trillion, one hundred sixty-one billion, five hundred three million, three hundred ninety thousand, nine hundred twenty-nine".