63709317919 has 8 divisors (see below), whose sum is σ = 68621787360. Its totient is φ = 58798527456.

The previous prime is 63709317907. The next prime is 63709318033. The reversal of 63709317919 is 91971390736.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 63709317919 - 2²⁷ = 63575100191 is a prime.

It is a super-2 number, since 2×63709317919² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63709317919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63709317019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340372 + ... + 493225.

It is an arithmetic number, because the mean of its divisors is an integer number (8577723420).

Almost surely, 2^63709317919 is an apocalyptic number.

63709317919 is a deficient number, since it is larger than the sum of its proper divisors (4912469441).

63709317919 is a wasteful number, since it uses less digits than its factorization.

63709317919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839489.

The product of its (nonzero) digits is 1928934, while the sum is 55.

The spelling of 63709317919 in words is "sixty-three billion, seven hundred nine million, three hundred seventeen thousand, nine hundred nineteen".