63746655361 has 3 divisors (see below), whose sum is σ = 63746907843. Its totient is φ = 63746402880.

The previous prime is 63746655347. The next prime is 63746655367. The reversal of 63746655361 is 16355664736.

The square root of 63746655361 is 252481.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 46669392961 + 17077262400 = 216031^2 + 130680^2 .

It is not a de Polignac number, because 63746655361 - 2⁹ = 63746654849 is a prime.

It is a super-2 number, since 2×63746655361² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63746655299 and 63746655308.

It is not an unprimeable number, because it can be changed into a prime (63746655367) 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 2 ways as a sum of consecutive naturals, for example, 126241 + ... + 378721.

It is an arithmetic number, because the mean of its divisors is an integer number (21248969281).

Almost surely, 2^63746655361 is an apocalyptic number.

63746655361 is the 252481-st square number.

63746655361 is the 126241-st centered octagonal number.

It is an amenable number.

63746655361 is a deficient number, since it is larger than the sum of its proper divisors (252482).

63746655361 is an frugal number, since it uses more digits than its factorization.

63746655361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504962 (or 252481 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 52.

The spelling of 63746655361 in words is "sixty-three billion, seven hundred forty-six million, six hundred fifty-five thousand, three hundred sixty-one".