63199176943681 has 3 divisors (see below), whose sum is σ = 63199184893473. Its totient is φ = 63199168993890.

The previous prime is 63199176943633. The next prime is 63199176943687. The reversal of 63199176943681 is 18634967199136.

The square root of 63199176943681 is 7949791.

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 63199176943681 - 2¹¹ = 63199176941633 is a prime.

It is a super-2 number, since 2×63199176943681² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63199176943687) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3974896 + ... + 11924686.

It is an arithmetic number, because the mean of its divisors is an integer number (21066394964491).

Almost surely, 2^{63199176943681} is an apocalyptic number.

63199176943681 is the 7949791-st square number.

63199176943681 is the 3974896-th centered octagonal number.

It is an amenable number.

63199176943681 is a deficient number, since it is larger than the sum of its proper divisors (7949792).

63199176943681 is an frugal number, since it uses more digits than its factorization.

63199176943681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15899582 (or 7949791 counting only the distinct ones).

The product of its digits is 317447424, while the sum is 73.

The spelling of 63199176943681 in words is "sixty-three trillion, one hundred ninety-nine billion, one hundred seventy-six million, nine hundred forty-three thousand, six hundred eighty-one".