63218731940 has 96 divisors (see below), whose sum is σ = 164644026624. Its totient is φ = 19854881280.

The previous prime is 63218731871. The next prime is 63218731969. The reversal of 63218731940 is 4913781236.

It is a junction number, because it is equal to n+sod(n) for n = 63218731891 and 63218731900.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105842 + ... + 370998.

It is an arithmetic number, because the mean of its divisors is an integer number (1715041944).

Almost surely, 2^63218731940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63218731940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82322013312).

63218731940 is an abundant number, since it is smaller than the sum of its proper divisors (101425294684).

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

63218731940 is a wasteful number, since it uses less digits than its factorization.

63218731940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265317 (or 265315 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 63218731940 in words is "sixty-three billion, two hundred eighteen million, seven hundred thirty-one thousand, nine hundred forty".