642677378916 has 24 divisors (see below), whose sum is σ = 1499593513824. Its totient is φ = 214223941120.

The previous prime is 642677378911. The next prime is 642677378923. The reversal of 642677378916 is 619873776246.

It is not an unprimeable number, because it can be changed into a prime (642677378911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2596531 + ... + 2833253.

It is an arithmetic number, because the mean of its divisors is an integer number (62483063076).

Almost surely, 2^642677378916 is an apocalyptic number.

It is an amenable number.

642677378916 is an abundant number, since it is smaller than the sum of its proper divisors (856916134908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642677378916 is a wasteful number, since it uses less digits than its factorization.

642677378916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462971 (or 462969 counting only the distinct ones).

The product of its digits is 128024064, while the sum is 66.

The spelling of 642677378916 in words is "six hundred forty-two billion, six hundred seventy-seven million, three hundred seventy-eight thousand, nine hundred sixteen".