12457799172127 has 8 divisors (see below), whose sum is σ = 12543464412864. Its totient is φ = 12372351633408.

The previous prime is 12457799172059. The next prime is 12457799172163. The reversal of 12457799172127 is 72127199775421.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12457799172127 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 (12457799172167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54310663 + ... + 54539560.

It is an arithmetic number, because the mean of its divisors is an integer number (1567933051608).

Almost surely, 2^{12457799172127} is an apocalyptic number.

12457799172127 is a deficient number, since it is larger than the sum of its proper divisors (85665240737).

12457799172127 is a wasteful number, since it uses less digits than its factorization.

12457799172127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108851009.

The product of its digits is 31116960, while the sum is 64.

The spelling of 12457799172127 in words is "twelve trillion, four hundred fifty-seven billion, seven hundred ninety-nine million, one hundred seventy-two thousand, one hundred twenty-seven".