1998767074836 has 48 divisors (see below), whose sum is σ = 5341708754816. Its totient is φ = 569826676224.

The previous prime is 1998767074823. The next prime is 1998767074841. The reversal of 1998767074836 is 6384707678991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25995361 + ... + 26072136.

Almost surely, 2^{1998767074836} is an apocalyptic number.

It is an amenable number.

1998767074836 is an abundant number, since it is smaller than the sum of its proper divisors (3342941679980).

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

1998767074836 is a wasteful number, since it uses less digits than its factorization.

1998767074836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52067968 (or 52067966 counting only the distinct ones).

The product of its (nonzero) digits is 768144384, while the sum is 75.

The spelling of 1998767074836 in words is "one trillion, nine hundred ninety-eight billion, seven hundred sixty-seven million, seventy-four thousand, eight hundred thirty-six".