63727033697 has 4 divisors (see below), whose sum is σ = 67475682756. Its totient is φ = 59978384640.

The previous prime is 63727033691. The next prime is 63727033703. The reversal of 63727033697 is 79633072736.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (63727033691) and next prime (63727033703).

It can be written as a sum of positive squares in 2 ways, for example, as 25379994721 + 38347038976 = 159311^2 + 195824^2 .

It is a cyclic number.

It is not a de Polignac number, because 63727033697 - 2⁸ = 63727033441 is a prime.

It is a super-2 number, since 2×63727033697² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63727033691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1874324504 + ... + 1874324537.

It is an arithmetic number, because the mean of its divisors is an integer number (16868920689).

Almost surely, 2^63727033697 is an apocalyptic number.

It is an amenable number.

63727033697 is a deficient number, since it is larger than the sum of its proper divisors (3748649059).

63727033697 is a wasteful number, since it uses less digits than its factorization.

63727033697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3748649058.

The product of its (nonzero) digits is 6001128, while the sum is 53.

The spelling of 63727033697 in words is "sixty-three billion, seven hundred twenty-seven million, thirty-three thousand, six hundred ninety-seven".