642225716 has 12 divisors (see below), whose sum is σ = 1226067360. Its totient is φ = 291920760.

The previous prime is 642225673. The next prime is 642225737. The reversal of 642225716 is 617522246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7297976 + ... + 7298063.

It is an arithmetic number, because the mean of its divisors is an integer number (102172280).

Almost surely, 2^642225716 is an apocalyptic number.

It is an amenable number.

642225716 is a deficient number, since it is larger than the sum of its proper divisors (583841644).

642225716 is a wasteful number, since it uses less digits than its factorization.

642225716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14596054 (or 14596052 counting only the distinct ones).

The product of its digits is 40320, while the sum is 35.

The square root of 642225716 is about 25342.1726771798. The cubic root of 642225716 is about 862.7717118036.

The spelling of 642225716 in words is "six hundred forty-two million, two hundred twenty-five thousand, seven hundred sixteen".