63012549821 has 32 divisors (see below), whose sum is σ = 69642720000. Its totient is φ = 56657829888.

The previous prime is 63012549781. The next prime is 63012549833. The reversal of 63012549821 is 12894521036.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63012549821 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63012542821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44720765 + ... + 44722173.

It is an arithmetic number, because the mean of its divisors is an integer number (2176335000).

Almost surely, 2^63012549821 is an apocalyptic number.

It is an amenable number.

63012549821 is a deficient number, since it is larger than the sum of its proper divisors (6630170179).

63012549821 is a wasteful number, since it uses less digits than its factorization.

63012549821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973.

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 63012549821 in words is "sixty-three billion, twelve million, five hundred forty-nine thousand, eight hundred twenty-one".