12157827825671 has 4 divisors (see below), whose sum is σ = 13263084900744. Its totient is φ = 11052570750600.

The previous prime is 12157827825641. The next prime is 12157827825677. The reversal of 12157827825671 is 17652872875121.

It is a happy number.

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 12157827825671 - 2³⁴ = 12140647956487 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 (12157827825677) 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 3 ways as a sum of consecutive naturals, for example, 552628537520 + ... + 552628537541.

It is an arithmetic number, because the mean of its divisors is an integer number (3315771225186).

Almost surely, 2^{12157827825671} is an apocalyptic number.

12157827825671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12157827825671 is a deficient number, since it is larger than the sum of its proper divisors (1105257075073).

12157827825671 is a wasteful number, since it uses less digits than its factorization.

12157827825671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105257075072.

The product of its digits is 26342400, while the sum is 62.

The spelling of 12157827825671 in words is "twelve trillion, one hundred fifty-seven billion, eight hundred twenty-seven million, eight hundred twenty-five thousand, six hundred seventy-one".