127912877897 has 16 divisors (see below), whose sum is σ = 151261568640. Its totient is φ = 105834769152.

The previous prime is 127912877893. The next prime is 127912877909. The reversal of 127912877897 is 798778219721.

It is a happy number.

It is not a de Polignac number, because 127912877897 - 2² = 127912877893 is a prime.

It is a super-2 number, since 2×127912877897² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (127912877891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 848513 + ... + 987825.

It is an arithmetic number, because the mean of its divisors is an integer number (9453848040).

Almost surely, 2^127912877897 is an apocalyptic number.

It is an amenable number.

127912877897 is a deficient number, since it is larger than the sum of its proper divisors (23348690743).

127912877897 is a wasteful number, since it uses less digits than its factorization.

127912877897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143872.

The product of its digits is 49787136, while the sum is 68.

The spelling of 127912877897 in words is "one hundred twenty-seven billion, nine hundred twelve million, eight hundred seventy-seven thousand, eight hundred ninety-seven".