12811985298 has 160 divisors (see below), whose sum is σ = 35019730944. Its totient is φ = 3417458688.

The previous prime is 12811985293. The next prime is 12811985353. The reversal of 12811985298 is 89258911821.

12811985298 is a `hidden beast` number, since 1 + 28 + 1 + 1 + 98 + 529 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (12811985293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2445690 + ... + 2450922.

Almost surely, 2^12811985298 is an apocalyptic number.

12811985298 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12811985298, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17509865472).

12811985298 is an abundant number, since it is smaller than the sum of its proper divisors (22207745646).

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

12811985298 is a wasteful number, since it uses less digits than its factorization.

12811985298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5398 (or 5389 counting only the distinct ones).

The product of its digits is 829440, while the sum is 54.

The spelling of 12811985298 in words is "twelve billion, eight hundred eleven million, nine hundred eighty-five thousand, two hundred ninety-eight".