63491749206 has 16 divisors (see below), whose sum is σ = 126988365504. Its totient is φ = 21163105224.

The previous prime is 63491749187. The next prime is 63491749213. The reversal of 63491749206 is 60294719436.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20620 + ... + 356943.

It is an arithmetic number, because the mean of its divisors is an integer number (7936772844).

Almost surely, 2^63491749206 is an apocalyptic number.

63491749206 is an abundant number, since it is smaller than the sum of its proper divisors (63496616298).

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

63491749206 is a wasteful number, since it uses less digits than its factorization.

63491749206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405595.

The product of its (nonzero) digits is 1959552, while the sum is 51.

The spelling of 63491749206 in words is "sixty-three billion, four hundred ninety-one million, seven hundred forty-nine thousand, two hundred six".