12491037557 has 8 divisors (see below), whose sum is σ = 12923040000. Its totient is φ = 12059120304.

The previous prime is 12491037523. The next prime is 12491037569. The reversal of 12491037557 is 75573019421.

12491037557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12491037557 - 2⁸ = 12491037301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12491037577) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 467444 + ... + 493442.

It is an arithmetic number, because the mean of its divisors is an integer number (1615380000).

Almost surely, 2^12491037557 is an apocalyptic number.

It is an amenable number.

12491037557 is a deficient number, since it is larger than the sum of its proper divisors (432002443).

12491037557 is a wasteful number, since it uses less digits than its factorization.

12491037557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42595.

The product of its (nonzero) digits is 264600, while the sum is 44.

The spelling of 12491037557 in words is "twelve billion, four hundred ninety-one million, thirty-seven thousand, five hundred fifty-seven".