63642171206 has 16 divisors (see below), whose sum is σ = 100189648224. Its totient is φ = 30261616704.

The previous prime is 63642171191. The next prime is 63642171331. The reversal of 63642171206 is 60217124636.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 63642171206.

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, 3990671 + ... + 4006586.

It is an arithmetic number, because the mean of its divisors is an integer number (6261853014).

Almost surely, 2^63642171206 is an apocalyptic number.

63642171206 is a deficient number, since it is larger than the sum of its proper divisors (36547477018).

63642171206 is a wasteful number, since it uses less digits than its factorization.

63642171206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7997455.

The product of its (nonzero) digits is 72576, while the sum is 38.

The spelling of 63642171206 in words is "sixty-three billion, six hundred forty-two million, one hundred seventy-one thousand, two hundred six".