642347877863 has 8 divisors (see below), whose sum is σ = 657303850368. Its totient is φ = 627392707704.

The previous prime is 642347877833. The next prime is 642347877877. The reversal of 642347877863 is 368778743246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642347877863 - 2²⁰ = 642346829287 is a prime.

It is a super-2 number, since 2×642347877863² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 642347877863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642347877803) 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 7 ways as a sum of consecutive naturals, for example, 1606556 + ... + 1966142.

It is an arithmetic number, because the mean of its divisors is an integer number (82162981296).

Almost surely, 2^642347877863 is an apocalyptic number.

642347877863 is a deficient number, since it is larger than the sum of its proper divisors (14955972505).

642347877863 is a wasteful number, since it uses less digits than its factorization.

642347877863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401173.

The product of its digits is 227598336, while the sum is 65.

The spelling of 642347877863 in words is "six hundred forty-two billion, three hundred forty-seven million, eight hundred seventy-seven thousand, eight hundred sixty-three".