2154992974193 has 2 divisors, whose sum is σ = 2154992974194. Its totient is φ = 2154992974192.

The previous prime is 2154992974103. The next prime is 2154992974213. The reversal of 2154992974193 is 3914792994512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1386525090064 + 768467884129 = 1177508^2 + 876623^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154992974193 - 2²⁰ = 2154991925617 is a prime.

It is not a weakly prime, because it can be changed into another prime (2154992974103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077496487096 + 1077496487097.

It is an arithmetic number, because the mean of its divisors is an integer number (1077496487097).

Almost surely, 2^{2154992974193} is an apocalyptic number.

It is an amenable number.

2154992974193 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154992974193 is an equidigital number, since it uses as much as digits as its factorization.

2154992974193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44089920, while the sum is 65.

The spelling of 2154992974193 in words is "two trillion, one hundred fifty-four billion, nine hundred ninety-two million, nine hundred seventy-four thousand, one hundred ninety-three".