63342035721 has 10 divisors (see below), whose sum is σ = 94622053482. Its totient is φ = 42228023760.

The previous prime is 63342035681. The next prime is 63342035737. The reversal of 63342035721 is 12753024336.

63342035721 is a `hidden beast` number, since 63 + 3 + 4 + 20 + 3 + 572 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 63069290496 + 272745225 = 251136^2 + 16515^2 .

It is not a de Polignac number, because 63342035721 - 2¹¹ = 63342033673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63342035221) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 391000140 + ... + 391000301.

Almost surely, 2^63342035721 is an apocalyptic number.

It is an amenable number.

63342035721 is a deficient number, since it is larger than the sum of its proper divisors (31280017761).

63342035721 is an equidigital number, since it uses as much as digits as its factorization.

63342035721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782000453 (or 782000444 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 36.

The spelling of 63342035721 in words is "sixty-three billion, three hundred forty-two million, thirty-five thousand, seven hundred twenty-one".