63552077721 has 96 divisors (see below), whose sum is σ = 107628393600. Its totient is φ = 35708682240.

The previous prime is 63552077717. The next prime is 63552077731. The reversal of 63552077721 is 12777025536.

63552077721 is a `hidden beast` number, since 6 + 3 + 552 + 0 + 7 + 77 + 21 = 666.

It is not a de Polignac number, because 63552077721 - 2² = 63552077717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63552077731) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 50477590 + ... + 50478848.

It is an arithmetic number, because the mean of its divisors is an integer number (1121129100).

Almost surely, 2^63552077721 is an apocalyptic number.

It is an amenable number.

63552077721 is a deficient number, since it is larger than the sum of its proper divisors (44076315879).

63552077721 is a wasteful number, since it uses less digits than its factorization.

63552077721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719 (or 1716 counting only the distinct ones).

The product of its (nonzero) digits is 617400, while the sum is 45.

The spelling of 63552077721 in words is "sixty-three billion, five hundred fifty-two million, seventy-seven thousand, seven hundred twenty-one".