63727717745 has 8 divisors (see below), whose sum is σ = 76474655016. Its totient is φ = 50981245056.

The previous prime is 63727717687. The next prime is 63727717759. The reversal of 63727717745 is 54771772736.

It can be written as a sum of positive squares in 4 ways, for example, as 31846543936 + 31881173809 = 178456^2 + 178553^2 .

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 63727717745 - 2⁶ = 63727717681 is a prime.

It is a super-2 number, since 2×63727717745² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372659 + ... + 516071.

It is an arithmetic number, because the mean of its divisors is an integer number (9559331877).

Almost surely, 2^63727717745 is an apocalyptic number.

It is an amenable number.

63727717745 is a deficient number, since it is larger than the sum of its proper divisors (12746937271).

63727717745 is a wasteful number, since it uses less digits than its factorization.

63727717745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232291.

The product of its digits is 12101040, while the sum is 56.

The spelling of 63727717745 in words is "sixty-three billion, seven hundred twenty-seven million, seven hundred seventeen thousand, seven hundred forty-five".