63545221873 has 16 divisors (see below), whose sum is σ = 75423968640. Its totient is φ = 52399771776.

The previous prime is 63545221867. The next prime is 63545221907. The reversal of 63545221873 is 37812254536.

It is a de Polignac number, because none of the positive numbers 2^k-63545221873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63545227873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1355311 + ... + 1401412.

It is an arithmetic number, because the mean of its divisors is an integer number (4713998040).

Almost surely, 2^63545221873 is an apocalyptic number.

It is an amenable number.

63545221873 is a deficient number, since it is larger than the sum of its proper divisors (11878746767).

63545221873 is a wasteful number, since it uses less digits than its factorization.

63545221873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2756856.

The product of its digits is 1209600, while the sum is 46.

It can be divided in two parts, 6354522 and 1873, that added together give a triangular number (6356395 = T₃₅₆₅).

The spelling of 63545221873 in words is "sixty-three billion, five hundred forty-five million, two hundred twenty-one thousand, eight hundred seventy-three".