642612662179 has 2 divisors, whose sum is σ = 642612662180. Its totient is φ = 642612662178.

The previous prime is 642612662147. The next prime is 642612662201. The reversal of 642612662179 is 971266216246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 642612662179 - 2⁵ = 642612662147 is a prime.

It is not a weakly prime, because it can be changed into another prime (642612662129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321306331089 + 321306331090.

It is an arithmetic number, because the mean of its divisors is an integer number (321306331090).

Almost surely, 2^642612662179 is an apocalyptic number.

642612662179 is a deficient number, since it is larger than the sum of its proper divisors (1).

642612662179 is an equidigital number, since it uses as much as digits as its factorization.

642612662179 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 52.

The spelling of 642612662179 in words is "six hundred forty-two billion, six hundred twelve million, six hundred sixty-two thousand, one hundred seventy-nine".