63744361920 has 168 divisors, whose sum is σ = 219367577520. Its totient is φ = 16989696000.

The previous prime is 63744361913. The next prime is 63744361949. The reversal of 63744361920 is 2916344736.

63744361920 is a `hidden beast` number, since 6 + 3 + 7 + 4 + 4 + 3 + 619 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7077420 + ... + 7086420.

It is an arithmetic number, because the mean of its divisors is an integer number (1305759390).

Almost surely, 2^63744361920 is an apocalyptic number.

63744361920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63744361920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109683788760).

63744361920 is an abundant number, since it is smaller than the sum of its proper divisors (155623215600).

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

63744361920 is a wasteful number, since it uses less digits than its factorization.

63744361920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11483 (or 11470 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

The spelling of 63744361920 in words is "sixty-three billion, seven hundred forty-four million, three hundred sixty-one thousand, nine hundred twenty".