642030865687 has 16 divisors (see below), whose sum is σ = 696654864864. Its totient is φ = 589291648000.

The previous prime is 642030865583. The next prime is 642030865703. The reversal of 642030865687 is 786568030246.

It is a cyclic number.

It is not a de Polignac number, because 642030865687 - 2³⁵ = 607671127319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642030865187) 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 15 ways as a sum of consecutive naturals, for example, 1582137 + ... + 1946077.

It is an arithmetic number, because the mean of its divisors is an integer number (43540929054).

Almost surely, 2^642030865687 is an apocalyptic number.

642030865687 is a deficient number, since it is larger than the sum of its proper divisors (54623999177).

642030865687 is a wasteful number, since it uses less digits than its factorization.

642030865687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366530.

The product of its (nonzero) digits is 11612160, while the sum is 55.

The spelling of 642030865687 in words is "six hundred forty-two billion, thirty million, eight hundred sixty-five thousand, six hundred eighty-seven".