639525002 has 8 divisors (see below), whose sum is σ = 962935776. Its totient is φ = 318546412.

The previous prime is 639524999. The next prime is 639525049. The reversal of 639525002 is 200525936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 639525002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 607388 + ... + 608439.

It is an arithmetic number, because the mean of its divisors is an integer number (120366972).

Almost surely, 2^639525002 is an apocalyptic number.

639525002 is a deficient number, since it is larger than the sum of its proper divisors (323410774).

639525002 is a wasteful number, since it uses less digits than its factorization.

639525002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216092.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 639525002 is about 25288.8315665236. The cubic root of 639525002 is about 861.5606248783.

The spelling of 639525002 in words is "six hundred thirty-nine million, five hundred twenty-five thousand, two".