642623430536 has 16 divisors (see below), whose sum is σ = 1205897763840. Its totient is φ = 321050693520.

The previous prime is 642623430517. The next prime is 642623430551. The reversal of 642623430536 is 635034326246.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32617256 + ... + 32636951.

It is an arithmetic number, because the mean of its divisors is an integer number (75368610240).

Almost surely, 2^642623430536 is an apocalyptic number.

It is an amenable number.

642623430536 is a deficient number, since it is larger than the sum of its proper divisors (563274333304).

642623430536 is a wasteful number, since it uses less digits than its factorization.

642623430536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65255444 (or 65255440 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 44.

The spelling of 642623430536 in words is "six hundred forty-two billion, six hundred twenty-three million, four hundred thirty thousand, five hundred thirty-six".