63418852561 has 3 divisors (see below), whose sum is σ = 63419104393. Its totient is φ = 63418600730.

The previous prime is 63418852537. The next prime is 63418852573. The reversal of 63418852561 is 16525881436.

The square root of 63418852561 is 251831.

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 is not a de Polignac number, because 63418852561 - 2¹⁹ = 63418328273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63418859561) 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, 125916 + ... + 377746.

Almost surely, 2^63418852561 is an apocalyptic number.

63418852561 is the 251831-st square number.

63418852561 is the 125916-th centered octagonal number.

It is an amenable number.

63418852561 is a deficient number, since it is larger than the sum of its proper divisors (251832).

63418852561 is an frugal number, since it uses more digits than its factorization.

63418852561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503662 (or 251831 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 49.

Multiplying 63418852561 by its sum of digits (49), we get a square (3107523775489 = 1762817²).

The spelling of 63418852561 in words is "sixty-three billion, four hundred eighteen million, eight hundred fifty-two thousand, five hundred sixty-one".