642325016 has 8 divisors (see below), whose sum is σ = 1204359420. Its totient is φ = 321162504.

The previous prime is 642325007. The next prime is 642325049. The reversal of 642325016 is 610523246.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 642325016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40145306 + ... + 40145321.

Almost surely, 2^642325016 is an apocalyptic number.

It is an amenable number.

642325016 is a deficient number, since it is larger than the sum of its proper divisors (562034404).

642325016 is a wasteful number, since it uses less digits than its factorization.

642325016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80290633 (or 80290629 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 642325016 is about 25344.1317862735. The cubic root of 642325016 is about 862.8161763450.

The spelling of 642325016 in words is "six hundred forty-two million, three hundred twenty-five thousand, sixteen".