642822860860 has 12 divisors (see below), whose sum is σ = 1349928007848. Its totient is φ = 257129144336.

The previous prime is 642822860843. The next prime is 642822860887. The reversal of 642822860860 is 68068228246.

642822860860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 642822860798 and 642822860807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16070571502 + ... + 16070571541.

It is an arithmetic number, because the mean of its divisors is an integer number (112494000654).

Almost surely, 2^642822860860 is an apocalyptic number.

It is an amenable number.

642822860860 is an abundant number, since it is smaller than the sum of its proper divisors (707105146988).

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

642822860860 is a wasteful number, since it uses less digits than its factorization.

642822860860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32141143052 (or 32141143050 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 52.

The spelling of 642822860860 in words is "six hundred forty-two billion, eight hundred twenty-two million, eight hundred sixty thousand, eight hundred sixty".