642656351350 has 48 divisors (see below), whose sum is σ = 1287380727360. Its totient is φ = 237271795200.

The previous prime is 642656351341. The next prime is 642656351383. The reversal of 642656351350 is 53153656246.

642656351350 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 642656351350.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12902995 + ... + 12952705.

It is an arithmetic number, because the mean of its divisors is an integer number (26820431820).

Almost surely, 2^642656351350 is an apocalyptic number.

642656351350 is an abundant number, since it is smaller than the sum of its proper divisors (644724376010).

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

642656351350 is a wasteful number, since it uses less digits than its factorization.

642656351350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69625 (or 69620 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 46.

The spelling of 642656351350 in words is "six hundred forty-two billion, six hundred fifty-six million, three hundred fifty-one thousand, three hundred fifty".