12538507581427 has 4 divisors (see below), whose sum is σ = 12538522679680. Its totient is φ = 12538492483176.

The previous prime is 12538507581311. The next prime is 12538507581493. The reversal of 12538507581427 is 72418570583521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12538507581427 - 2¹⁵ = 12538507548659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12538507581497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6226152 + ... + 7990117.

It is an arithmetic number, because the mean of its divisors is an integer number (3134630669920).

Almost surely, 2^{12538507581427} is an apocalyptic number.

12538507581427 is a deficient number, since it is larger than the sum of its proper divisors (15098253).

12538507581427 is an equidigital number, since it uses as much as digits as its factorization.

12538507581427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15098252.

The product of its (nonzero) digits is 18816000, while the sum is 58.

The spelling of 12538507581427 in words is "twelve trillion, five hundred thirty-eight billion, five hundred seven million, five hundred eighty-one thousand, four hundred twenty-seven".