2143555772923 has 2 divisors, whose sum is σ = 2143555772924. Its totient is φ = 2143555772922.

The previous prime is 2143555772899. The next prime is 2143555772957. The reversal of 2143555772923 is 3292775553412.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2143555772923 - 2⁹ = 2143555772411 is a prime.

It is not a weakly prime, because it can be changed into another prime (2143555772023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071777886461 + 1071777886462.

It is an arithmetic number, because the mean of its divisors is an integer number (1071777886462).

Almost surely, 2^{2143555772923} is an apocalyptic number.

2143555772923 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143555772923 is an equidigital number, since it uses as much as digits as its factorization.

2143555772923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876000, while the sum is 55.

The spelling of 2143555772923 in words is "two trillion, one hundred forty-three billion, five hundred fifty-five million, seven hundred seventy-two thousand, nine hundred twenty-three".