642015678607 has 2 divisors, whose sum is σ = 642015678608. Its totient is φ = 642015678606.

The previous prime is 642015678583. The next prime is 642015678641. The reversal of 642015678607 is 706876510246.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 642015678607 - 2²⁷ = 641881460879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642015678677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321007839303 + 321007839304.

It is an arithmetic number, because the mean of its divisors is an integer number (321007839304).

Almost surely, 2^642015678607 is an apocalyptic number.

642015678607 is a deficient number, since it is larger than the sum of its proper divisors (1).

642015678607 is an equidigital number, since it uses as much as digits as its factorization.

642015678607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 642015678607 in words is "six hundred forty-two billion, fifteen million, six hundred seventy-eight thousand, six hundred seven".