1998606176488 has 8 divisors (see below), whose sum is σ = 3747386580930. Its totient is φ = 999303088240.

The previous prime is 1998606176461. The next prime is 1998606176521. The reversal of 1998606176488 is 8846716068991.

It can be written as a sum of positive squares in only one way, i.e., 1656477109764 + 342129066724 = 1287042^2 + 584918^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1998606176488.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124912886023 + ... + 124912886038.

Almost surely, 2^{1998606176488} is an apocalyptic number.

It is an amenable number.

1998606176488 is a deficient number, since it is larger than the sum of its proper divisors (1748780404442).

1998606176488 is a wasteful number, since it uses less digits than its factorization.

1998606176488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249825772067 (or 249825772063 counting only the distinct ones).

The product of its (nonzero) digits is 250822656, while the sum is 73.

The spelling of 1998606176488 in words is "one trillion, nine hundred ninety-eight billion, six hundred six million, one hundred seventy-six thousand, four hundred eighty-eight".