63906712906 has 8 divisors (see below), whose sum is σ = 96937149060. Its totient is φ = 31594329888.

The previous prime is 63906712861. The next prime is 63906712927. The reversal of 63906712906 is 60921760936.

It can be written as a sum of positive squares in 2 ways, for example, as 63900256225 + 6456681 = 252785^2 + 2541^2 .

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 63906712906.

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, 179513061 + ... + 179513416.

Almost surely, 2^63906712906 is an apocalyptic number.

63906712906 is a deficient number, since it is larger than the sum of its proper divisors (33030436154).

63906712906 is a wasteful number, since it uses less digits than its factorization.

63906712906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359026568.

The product of its (nonzero) digits is 734832, while the sum is 49.

The spelling of 63906712906 in words is "sixty-three billion, nine hundred six million, seven hundred twelve thousand, nine hundred six".