642847816370 has 16 divisors (see below), whose sum is σ = 1157139589248. Its totient is φ = 257136122160.

The previous prime is 642847816339. The next prime is 642847816439. The reversal of 642847816370 is 73618748246.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658775 + ... + 1311365.

It is an arithmetic number, because the mean of its divisors is an integer number (72321224328).

Almost surely, 2^642847816370 is an apocalyptic number.

642847816370 is a deficient number, since it is larger than the sum of its proper divisors (514291772878).

642847816370 is a wasteful number, since it uses less digits than its factorization.

642847816370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751105.

The product of its (nonzero) digits is 10838016, while the sum is 56.

The spelling of 642847816370 in words is "six hundred forty-two billion, eight hundred forty-seven million, eight hundred sixteen thousand, three hundred seventy".