998517245636 has 24 divisors (see below), whose sum is σ = 1839428650080. Its totient is φ = 472967767872.

The previous prime is 998517245597. The next prime is 998517245651. The reversal of 998517245636 is 636542715899.

It is a super-2 number, since 2×998517245636² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2642291 + ... + 2996453.

It is an arithmetic number, because the mean of its divisors is an integer number (76642860420).

Almost surely, 2^998517245636 is an apocalyptic number.

It is an amenable number.

998517245636 is a deficient number, since it is larger than the sum of its proper divisors (840911404444).

998517245636 is a wasteful number, since it uses less digits than its factorization.

998517245636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391283 (or 391281 counting only the distinct ones).

The product of its digits is 97977600, while the sum is 65.

The spelling of 998517245636 in words is "nine hundred ninety-eight billion, five hundred seventeen million, two hundred forty-five thousand, six hundred thirty-six".