642463532634 has 96 divisors (see below), whose sum is σ = 1634363269056. Its totient is φ = 166487892480.

The previous prime is 642463532611. The next prime is 642463532663. The reversal of 642463532634 is 436235364246.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1170924 + ... + 1629720.

It is an arithmetic number, because the mean of its divisors is an integer number (17024617386).

Almost surely, 2^642463532634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642463532634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (817181634528).

642463532634 is an abundant number, since it is smaller than the sum of its proper divisors (991899736422).

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

642463532634 is a wasteful number, since it uses less digits than its factorization.

642463532634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459260 (or 459253 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 48.

The spelling of 642463532634 in words is "six hundred forty-two billion, four hundred sixty-three million, five hundred thirty-two thousand, six hundred thirty-four".