63704196535521 has 32 divisors (see below), whose sum is σ = 88890675793920. Its totient is φ = 40533193483200.

The previous prime is 63704196535513. The next prime is 63704196535531. The reversal of 63704196535521 is 12553569140736.

It is not a de Polignac number, because 63704196535521 - 2³ = 63704196535513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63704196535531) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2819166 + ... + 11634263.

It is an arithmetic number, because the mean of its divisors is an integer number (2777833618560).

Almost surely, 2^{63704196535521} is an apocalyptic number.

It is an amenable number.

63704196535521 is a deficient number, since it is larger than the sum of its proper divisors (25186479258399).

63704196535521 is a wasteful number, since it uses less digits than its factorization.

63704196535521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14454117.

The product of its (nonzero) digits is 20412000, while the sum is 57.

The spelling of 63704196535521 in words is "sixty-three trillion, seven hundred four billion, one hundred ninety-six million, five hundred thirty-five thousand, five hundred twenty-one".