998188000820 has 12 divisors (see below), whose sum is σ = 2096194801764. Its totient is φ = 399275200320.

The previous prime is 998188000819. The next prime is 998188000921. The reversal of 998188000820 is 28000881899.

It can be written as a sum of positive squares in 2 ways, for example, as 126526758436 + 871661242384 = 355706^2 + 933628^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24954700001 + ... + 24954700040.

It is an arithmetic number, because the mean of its divisors is an integer number (174682900147).

Almost surely, 2^998188000820 is an apocalyptic number.

It is an amenable number.

998188000820 is an abundant number, since it is smaller than the sum of its proper divisors (1098006800944).

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

998188000820 is a wasteful number, since it uses less digits than its factorization.

998188000820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49909400050 (or 49909400048 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 53.

The spelling of 998188000820 in words is "nine hundred ninety-eight billion, one hundred eighty-eight million, eight hundred twenty", and thus it is an aban number.