642563000 has 32 divisors (see below), whose sum is σ = 1503599760. Its totient is φ = 257024800.

The previous prime is 642562969. The next prime is 642563023. The reversal of 642563000 is 365246.

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, 320282 + ... + 322281.

Almost surely, 2^642563000 is an apocalyptic number.

It is an amenable number.

642563000 is an abundant number, since it is smaller than the sum of its proper divisors (861036760).

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

642563000 is a wasteful number, since it uses less digits than its factorization.

642563000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642584 (or 642570 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 642563000 is about 25348.8264028140. The cubic root of 642563000 is about 862.9227221413.

The spelling of 642563000 in words is "six hundred forty-two million, five hundred sixty-three thousand".