63721417212 has 18 divisors (see below), whose sum is σ = 161073582488. Its totient is φ = 21240472392.

The previous prime is 63721417183. The next prime is 63721417267. The reversal of 63721417212 is 21271412736.

63721417212 is a `hidden beast` number, since 6 + 3 + 7 + 21 + 417 + 212 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1770039367 = 63721417212 / (6 + 3 + 7 + 2 + 1 + 4 + 1 + 7 + 2 + 1 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 885019648 + ... + 885019719.

Almost surely, 2^63721417212 is an apocalyptic number.

It is an amenable number.

63721417212 is an abundant number, since it is smaller than the sum of its proper divisors (97352165276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63721417212 is a wasteful number, since it uses less digits than its factorization.

63721417212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770039377 (or 1770039372 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

Adding to 63721417212 its reverse (21271412736), we get a palindrome (84992829948).

The spelling of 63721417212 in words is "sixty-three billion, seven hundred twenty-one million, four hundred seventeen thousand, two hundred twelve".