63812569445 has 4 divisors (see below), whose sum is σ = 76575083340. Its totient is φ = 51050055552.

The previous prime is 63812569417. The next prime is 63812569463. The reversal of 63812569445 is 54496521836.

It is a happy number.

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 7396344004 + 56416225441 = 86002^2 + 237521^2 .

It is a cyclic number.

It is not a de Polignac number, because 63812569445 - 2¹⁴ = 63812553061 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6381256940 + ... + 6381256949.

It is an arithmetic number, because the mean of its divisors is an integer number (19143770835).

Almost surely, 2^63812569445 is an apocalyptic number.

It is an amenable number.

63812569445 is a deficient number, since it is larger than the sum of its proper divisors (12762513895).

63812569445 is a wasteful number, since it uses less digits than its factorization.

63812569445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12762513894.

The product of its digits is 6220800, while the sum is 53.

The spelling of 63812569445 in words is "sixty-three billion, eight hundred twelve million, five hundred sixty-nine thousand, four hundred forty-five".