642682702158 has 32 divisors (see below), whose sum is σ = 1482717913344. Its totient is φ = 181907519232.

The previous prime is 642682702033. The next prime is 642682702159. The reversal of 642682702158 is 851207286246.

It is a self number, because there is not a number n which added to its sum of digits gives 642682702158.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642682702159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71500035 + ... + 71509022.

It is an arithmetic number, because the mean of its divisors is an integer number (46334934792).

Almost surely, 2^642682702158 is an apocalyptic number.

642682702158 is an abundant number, since it is smaller than the sum of its proper divisors (840035211186).

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

642682702158 is a wasteful number, since it uses less digits than its factorization.

642682702158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143009176.

The product of its (nonzero) digits is 2580480, while the sum is 51.

The spelling of 642682702158 in words is "six hundred forty-two billion, six hundred eighty-two million, seven hundred two thousand, one hundred fifty-eight".