127405886640511 has 4 divisors (see below), whose sum is σ = 127615781017792. Its totient is φ = 127195992263232.

The previous prime is 127405886640379. The next prime is 127405886640517. The reversal of 127405886640511 is 115046688504721.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127405886640511 is a prime.

It is a super-2 number, since 2×127405886640511² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127405886640517) 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, 104947187730 + ... + 104947188943.

It is an arithmetic number, because the mean of its divisors is an integer number (31903945254448).

Almost surely, 2^{127405886640511} is an apocalyptic number.

127405886640511 is a deficient number, since it is larger than the sum of its proper divisors (209894377281).

127405886640511 is an equidigital number, since it uses as much as digits as its factorization.

127405886640511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209894377280.

The product of its (nonzero) digits is 12902400, while the sum is 58.

The spelling of 127405886640511 in words is "one hundred twenty-seven trillion, four hundred five billion, eight hundred eighty-six million, six hundred forty thousand, five hundred eleven".