127813387657 has 32 divisors (see below), whose sum is σ = 139294656000. Its totient is φ = 116899511040.

The previous prime is 127813387643. The next prime is 127813387693. The reversal of 127813387657 is 756783318721.

It is a cyclic number.

It is not a de Polignac number, because 127813387657 - 2⁷ = 127813387529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127813387697) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15836019 + ... + 15844087.

It is an arithmetic number, because the mean of its divisors is an integer number (4352958000).

Almost surely, 2^127813387657 is an apocalyptic number.

It is an amenable number.

127813387657 is a deficient number, since it is larger than the sum of its proper divisors (11481268343).

127813387657 is a wasteful number, since it uses less digits than its factorization.

127813387657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8401.

The product of its digits is 11854080, while the sum is 58.

The spelling of 127813387657 in words is "one hundred twenty-seven billion, eight hundred thirteen million, three hundred eighty-seven thousand, six hundred fifty-seven".