642622612452 has 96 divisors (see below), whose sum is σ = 1555887513600. Its totient is φ = 206219520000.

The previous prime is 642622612391. The next prime is 642622612487. The reversal of 642622612452 is 254216226246.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85805124 + ... + 85812612.

It is an arithmetic number, because the mean of its divisors is an integer number (16207161600).

Almost surely, 2^642622612452 is an apocalyptic number.

642622612452 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

642622612452 is an abundant number, since it is smaller than the sum of its proper divisors (913264901148).

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

642622612452 is a wasteful number, since it uses less digits than its factorization.

642622612452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8697 (or 8695 counting only the distinct ones).

The product of its digits is 552960, while the sum is 42.

Adding to 642622612452 its reverse (254216226246), we get a palindrome (896838838698).

The spelling of 642622612452 in words is "six hundred forty-two billion, six hundred twenty-two million, six hundred twelve thousand, four hundred fifty-two".