1641860255923 has 2 divisors, whose sum is σ = 1641860255924. Its totient is φ = 1641860255922.

The previous prime is 1641860255909. The next prime is 1641860255933. The reversal of 1641860255923 is 3295520681461.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1641860255923 - 2²⁹ = 1641323385011 is a prime.

It is not a weakly prime, because it can be changed into another prime (1641860255933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820930127961 + 820930127962.

It is an arithmetic number, because the mean of its divisors is an integer number (820930127962).

Almost surely, 2^{1641860255923} is an apocalyptic number.

1641860255923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641860255923 is an equidigital number, since it uses as much as digits as its factorization.

1641860255923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3110400, while the sum is 52.

The spelling of 1641860255923 in words is "one trillion, six hundred forty-one billion, eight hundred sixty million, two hundred fifty-five thousand, nine hundred twenty-three".