12289457538 has 40 divisors (see below), whose sum is σ = 27546037200. Its totient is φ = 4095214200.

The previous prime is 12289457533. The next prime is 12289457563. The reversal of 12289457538 is 83575498221.

12289457538 is a `hidden beast` number, since 1 + 22 + 89 + 4 + 5 + 7 + 538 = 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 (12289457533) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 614013 + ... + 633711.

It is an arithmetic number, because the mean of its divisors is an integer number (688650930).

Almost surely, 2^12289457538 is an apocalyptic number.

12289457538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12289457538 is an abundant number, since it is smaller than the sum of its proper divisors (15256579662).

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

12289457538 is a wasteful number, since it uses less digits than its factorization.

12289457538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23564 (or 23555 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The spelling of 12289457538 in words is "twelve billion, two hundred eighty-nine million, four hundred fifty-seven thousand, five hundred thirty-eight".