63644421272000 has 112 divisors (see below), whose sum is σ = 157620085328160. Its totient is φ = 25457013248000.

The previous prime is 63644421271943. The next prime is 63644421272027. The reversal of 63644421272000 is 27212444636.

It is a super-2 number, since 2×63644421272000² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325814360 + ... + 326009640.

It is an arithmetic number, because the mean of its divisors is an integer number (1407322190430).

Almost surely, 2^{63644421272000} is an apocalyptic number.

It is an amenable number.

63644421272000 is an abundant number, since it is smaller than the sum of its proper divisors (93975664056160).

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

63644421272000 is a wasteful number, since it uses less digits than its factorization.

63644421272000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236047 (or 236027 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 41.

The spelling of 63644421272000 in words is "sixty-three trillion, six hundred forty-four billion, four hundred twenty-one million, two hundred seventy-two thousand".