12398771748 has 144 divisors (see below), whose sum is σ = 32535724032. Its totient is φ = 3671236800.

The previous prime is 12398771731. The next prime is 12398771753. The reversal of 12398771748 is 84717789321.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13092211 + ... + 13093157.

It is an arithmetic number, because the mean of its divisors is an integer number (225942528).

Almost surely, 2^12398771748 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12398771748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16267862016).

12398771748 is an abundant number, since it is smaller than the sum of its proper divisors (20136952284).

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

12398771748 is a wasteful number, since it uses less digits than its factorization.

12398771748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174 (or 1161 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 57.

The spelling of 12398771748 in words is "twelve billion, three hundred ninety-eight million, seven hundred seventy-one thousand, seven hundred forty-eight".