642441412550 has 48 divisors (see below), whose sum is σ = 1365712088832. Its totient is φ = 220255111200.

The previous prime is 642441412531. The next prime is 642441412573. The reversal of 642441412550 is 55214144246.

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, 12094349 + ... + 12147351.

It is an arithmetic number, because the mean of its divisors is an integer number (28452335184).

Almost surely, 2^642441412550 is an apocalyptic number.

642441412550 is an abundant number, since it is smaller than the sum of its proper divisors (723270676282).

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

642441412550 is a wasteful number, since it uses less digits than its factorization.

642441412550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87653 (or 87648 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 38.

Adding to 642441412550 its reverse (55214144246), we get a palindrome (697655556796).

The spelling of 642441412550 in words is "six hundred forty-two billion, four hundred forty-one million, four hundred twelve thousand, five hundred fifty".