642305616 has 40 divisors (see below), whose sum is σ = 1712818944. Its totient is φ = 207194880.

The previous prime is 642305603. The next prime is 642305623. The reversal of 642305616 is 616503246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214341 + ... + 217316.

Almost surely, 2^642305616 is an apocalyptic number.

It is an amenable number.

642305616 is an abundant number, since it is smaller than the sum of its proper divisors (1070513328).

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

642305616 is a wasteful number, since it uses less digits than its factorization.

642305616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431699 (or 431693 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 642305616 is about 25343.7490517879. The cubic root of 642305616 is about 862.8074897757.

The spelling of 642305616 in words is "six hundred forty-two million, three hundred five thousand, six hundred sixteen".