642612662107 has 4 divisors (see below), whose sum is σ = 692044405360. Its totient is φ = 593180918856.

The previous prime is 642612662099. The next prime is 642612662129. The reversal of 642612662107 is 701266216246.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 642612662107 - 2³ = 642612662099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642612662147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24715871607 + ... + 24715871632.

It is an arithmetic number, because the mean of its divisors is an integer number (173011101340).

Almost surely, 2^642612662107 is an apocalyptic number.

642612662107 is a deficient number, since it is larger than the sum of its proper divisors (49431743253).

642612662107 is a wasteful number, since it uses less digits than its factorization.

642612662107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49431743252.

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 642612662107 in words is "six hundred forty-two billion, six hundred twelve million, six hundred sixty-two thousand, one hundred seven".