63091998684 has 540 divisors, whose sum is σ = 203169110760. Its totient is φ = 16922131200.

The previous prime is 63091998677. The next prime is 63091998689. The reversal of 63091998684 is 48689919036.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63091998689) by changing a digit.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 578825622 + ... + 578825730.

It is an arithmetic number, because the mean of its divisors is an integer number (376239094).

Almost surely, 2^63091998684 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 63091998684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101584555380).

63091998684 is an abundant number, since it is smaller than the sum of its proper divisors (140077112076).

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

63091998684 is a wasteful number, since it uses less digits than its factorization.

63091998684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 63.

The spelling of 63091998684 in words is "sixty-three billion, ninety-one million, nine hundred ninety-eight thousand, six hundred eighty-four".