641376249893 has 2 divisors, whose sum is σ = 641376249894. Its totient is φ = 641376249892.

The previous prime is 641376249823. The next prime is 641376249967. The reversal of 641376249893 is 398942673146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 426615372964 + 214760876929 = 653158^2 + 463423^2 .

It is a cyclic number.

It is not a de Polignac number, because 641376249893 - 2⁸ = 641376249637 is a prime.

It is a super-2 number, since 2×641376249893² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641376249823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320688124946 + 320688124947.

It is an arithmetic number, because the mean of its divisors is an integer number (320688124947).

Almost surely, 2^641376249893 is an apocalyptic number.

It is an amenable number.

641376249893 is a deficient number, since it is larger than the sum of its proper divisors (1).

641376249893 is an equidigital number, since it uses as much as digits as its factorization.

641376249893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47029248, while the sum is 62.

The spelling of 641376249893 in words is "six hundred forty-one billion, three hundred seventy-six million, two hundred forty-nine thousand, eight hundred ninety-three".