63755205697 has 4 divisors (see below), whose sum is σ = 65310210756. Its totient is φ = 62200200640.

The previous prime is 63755205691. The next prime is 63755205739. The reversal of 63755205697 is 79650255736.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16612374321 + 47142831376 = 128889^2 + 217124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63755205697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63755205691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 777502468 + ... + 777502549.

It is an arithmetic number, because the mean of its divisors is an integer number (16327552689).

Almost surely, 2^63755205697 is an apocalyptic number.

It is an amenable number.

63755205697 is a deficient number, since it is larger than the sum of its proper divisors (1555005059).

63755205697 is a wasteful number, since it uses less digits than its factorization.

63755205697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555005058.

The product of its (nonzero) digits is 11907000, while the sum is 55.

The spelling of 63755205697 in words is "sixty-three billion, seven hundred fifty-five million, two hundred five thousand, six hundred ninety-seven".