642754212799 has 2 divisors, whose sum is σ = 642754212800. Its totient is φ = 642754212798.

The previous prime is 642754212769. The next prime is 642754212809. The reversal of 642754212799 is 997212457246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 642754212799 - 2⁷ = 642754212671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642754212739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321377106399 + 321377106400.

It is an arithmetic number, because the mean of its divisors is an integer number (321377106400).

Almost surely, 2^642754212799 is an apocalyptic number.

642754212799 is a deficient number, since it is larger than the sum of its proper divisors (1).

642754212799 is an equidigital number, since it uses as much as digits as its factorization.

642754212799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15240960, while the sum is 58.

The spelling of 642754212799 in words is "six hundred forty-two billion, seven hundred fifty-four million, two hundred twelve thousand, seven hundred ninety-nine".