642465225028 has 24 divisors (see below), whose sum is σ = 1291078444320. Its totient is φ = 276659665920.

The previous prime is 642465225011. The next prime is 642465225029. The reversal of 642465225028 is 820522564246.

It is not an unprimeable number, because it can be changed into a prime (642465225029) 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 7 ways as a sum of consecutive naturals, for example, 384248701 + ... + 384250372.

It is an arithmetic number, because the mean of its divisors is an integer number (53794935180).

Almost surely, 2^642465225028 is an apocalyptic number.

It is an amenable number.

642465225028 is an abundant number, since it is smaller than the sum of its proper divisors (648613219292).

642465225028 is a wasteful number, since it uses less digits than its factorization.

642465225028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768499107 (or 768499105 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 46.

The spelling of 642465225028 in words is "six hundred forty-two billion, four hundred sixty-five million, two hundred twenty-five thousand, twenty-eight".