63422645476721 has 4 divisors (see below), whose sum is σ = 66760679449200. Its totient is φ = 60084611504244.

The previous prime is 63422645476627. The next prime is 63422645476727. The reversal of 63422645476721 is 12767454622436.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63422645476721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63422645476727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1669016986211 + ... + 1669016986248.

It is an arithmetic number, because the mean of its divisors is an integer number (16690169862300).

Almost surely, 2^{63422645476721} is an apocalyptic number.

It is an amenable number.

63422645476721 is a deficient number, since it is larger than the sum of its proper divisors (3338033972479).

63422645476721 is a wasteful number, since it uses less digits than its factorization.

63422645476721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3338033972478.

The product of its digits is 81285120, while the sum is 59.

The spelling of 63422645476721 in words is "sixty-three trillion, four hundred twenty-two billion, six hundred forty-five million, four hundred seventy-six thousand, seven hundred twenty-one".