12491037558 has 12 divisors (see below), whose sum is σ = 27063914748. Its totient is φ = 4163679180.

The previous prime is 12491037523. The next prime is 12491037569. The reversal of 12491037558 is 85573019421.

12491037558 is a `hidden beast` number, since 1 + 2 + 4 + 91 + 0 + 3 + 7 + 558 = 666.

12491037558 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 346973248 + ... + 346973283.

It is an arithmetic number, because the mean of its divisors is an integer number (2255326229).

Almost surely, 2^12491037558 is an apocalyptic number.

12491037558 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12491037558 is an abundant number, since it is smaller than the sum of its proper divisors (14572877190).

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

12491037558 is a wasteful number, since it uses less digits than its factorization.

12491037558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693946539 (or 693946536 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 12491037558 in words is "twelve billion, four hundred ninety-one million, thirty-seven thousand, five hundred fifty-eight".