63263320816 has 60 divisors (see below), whose sum is σ = 130189251432. Its totient is φ = 29775537792.

The previous prime is 63263320801. The next prime is 63263320819. The reversal of 63263320816 is 61802336236.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63263320819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 871951 + ... + 941713.

Almost surely, 2^63263320816 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 63263320816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65094625716).

63263320816 is an abundant number, since it is smaller than the sum of its proper divisors (66925930616).

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

63263320816 is a wasteful number, since it uses less digits than its factorization.

63263320816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69966 (or 69941 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 63263320816 in words is "sixty-three billion, two hundred sixty-three million, three hundred twenty thousand, eight hundred sixteen".