642554970 has 32 divisors (see below), whose sum is σ = 1563857280. Its totient is φ = 168934080.

The previous prime is 642554963. The next prime is 642554971. The reversal of 642554970 is 79455246.

It is not an unprimeable number, because it can be changed into a prime (642554971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148705 + ... + 152964.

It is an arithmetic number, because the mean of its divisors is an integer number (48870540).

Almost surely, 2^642554970 is an apocalyptic number.

642554970 is an abundant number, since it is smaller than the sum of its proper divisors (921302310).

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

642554970 is a wasteful number, since it uses less digits than its factorization.

642554970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301750.

The product of its (nonzero) digits is 302400, while the sum is 42.

The square root of 642554970 is about 25348.6680123434. The cubic root of 642554970 is about 862.9191275270.

The spelling of 642554970 in words is "six hundred forty-two million, five hundred fifty-four thousand, nine hundred seventy".