998722746630 has 288 divisors, whose sum is σ = 3068865727200. Its totient is φ = 224660459520.

The previous prime is 998722746563. The next prime is 998722746631. The reversal of 998722746630 is 36647227899.

998722746630 is a `hidden beast` number, since 99 + 87 + 2 + 2 + 7 + 466 + 3 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998722746631) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 77419921 + ... + 77432819.

It is an arithmetic number, because the mean of its divisors is an integer number (10655783775).

Almost surely, 2^998722746630 is an apocalyptic number.

998722746630 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 998722746630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1534432863600).

998722746630 is an abundant number, since it is smaller than the sum of its proper divisors (2070142980570).

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

998722746630 is a wasteful number, since it uses less digits than its factorization.

998722746630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13204 (or 13194 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 63.

The spelling of 998722746630 in words is "nine hundred ninety-eight billion, seven hundred twenty-two million, seven hundred forty-six thousand, six hundred thirty".