998267638964 has 12 divisors (see below), whose sum is σ = 1746982072164. Its totient is φ = 499129904064.

The previous prime is 998267638897. The next prime is 998267638967. The reversal of 998267638964 is 469836762899.

998267638964 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 59000410000 + 939267228964 = 242900^2 + 969158^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998267638967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362009 + ... + 1458624.

It is an arithmetic number, because the mean of its divisors is an integer number (145581839347).

Almost surely, 2^998267638964 is an apocalyptic number.

It is an amenable number.

998267638964 is a deficient number, since it is larger than the sum of its proper divisors (748714433200).

998267638964 is a wasteful number, since it uses less digits than its factorization.

998267638964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957714 (or 1957712 counting only the distinct ones).

The product of its digits is 1693052928, while the sum is 77.

The spelling of 998267638964 in words is "nine hundred ninety-eight billion, two hundred sixty-seven million, six hundred thirty-eight thousand, nine hundred sixty-four".