642546700 has 18 divisors (see below), whose sum is σ = 1394326556. Its totient is φ = 257018640.

The previous prime is 642546679. The next prime is 642546727. The reversal of 642546700 is 7645246.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3212634 + ... + 3212833.

Almost surely, 2^642546700 is an apocalyptic number.

It is an amenable number.

642546700 is an abundant number, since it is smaller than the sum of its proper divisors (751779856).

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

642546700 is a wasteful number, since it uses less digits than its factorization.

642546700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6425481 (or 6425474 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 642546700 is about 25348.5048868765. The cubic root of 642546700 is about 862.9154254459.

The spelling of 642546700 in words is "six hundred forty-two million, five hundred forty-six thousand, seven hundred".