63421693513919 has 8 divisors (see below), whose sum is σ = 68300611218000. Its totient is φ = 58542822366336.

The previous prime is 63421693513909. The next prime is 63421693513939. The reversal of 63421693513919 is 91931539612436.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63421693513919 - 2⁴⁰ = 62322181886143 is a prime.

It is a super-2 number, since 2×63421693513919² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63421693513909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8783882 + ... + 14282855.

It is an arithmetic number, because the mean of its divisors is an integer number (8537576402250).

Almost surely, 2^{63421693513919} is an apocalyptic number.

63421693513919 is a deficient number, since it is larger than the sum of its proper divisors (4878917704081).

63421693513919 is a wasteful number, since it uses less digits than its factorization.

63421693513919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23278249.

The product of its digits is 28343520, while the sum is 62.

The spelling of 63421693513919 in words is "sixty-three trillion, four hundred twenty-one billion, six hundred ninety-three million, five hundred thirteen thousand, nine hundred nineteen".