639432419590 has 16 divisors (see below), whose sum is σ = 1151055515520. Its totient is φ = 255755821120.

The previous prime is 639432419543. The next prime is 639432419609. The reversal of 639432419590 is 95914234936.

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, 1986166 + ... + 2285545.

It is an arithmetic number, because the mean of its divisors is an integer number (71940969720).

Almost surely, 2^639432419590 is an apocalyptic number.

639432419590 is a deficient number, since it is larger than the sum of its proper divisors (511623095930).

639432419590 is a wasteful number, since it uses less digits than its factorization.

639432419590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4286687.

The product of its (nonzero) digits is 6298560, while the sum is 55.

The spelling of 639432419590 in words is "six hundred thirty-nine billion, four hundred thirty-two million, four hundred nineteen thousand, five hundred ninety".