998243783064 has 192 divisors, whose sum is σ = 3054583677600. Its totient is φ = 291729715200.

The previous prime is 998243783029. The next prime is 998243783111. The reversal of 998243783064 is 460387342899.

998243783064 is a `hidden beast` number, since 99 + 82 + 437 + 8 + 30 + 6 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 998243782992 and 998243783010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20210142 + ... + 20259474.

Almost surely, 2^998243783064 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 998243783064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1527291838800).

998243783064 is an abundant number, since it is smaller than the sum of its proper divisors (2056339894536).

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

998243783064 is a wasteful number, since it uses less digits than its factorization.

998243783064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50266 (or 50259 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 63.

The spelling of 998243783064 in words is "nine hundred ninety-eight billion, two hundred forty-three million, seven hundred eighty-three thousand, sixty-four".