127631328835613 has 4 divisors (see below), whose sum is σ = 130744288075548. Its totient is φ = 124518369595680.

The previous prime is 127631328835607. The next prime is 127631328835667. The reversal of 127631328835613 is 316538823136721.

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

It can be written as a sum of positive squares in 2 ways, for example, as 64912880263609 + 62718448572004 = 8056853^2 + 7919498^2 .

It is a cyclic number.

It is not a de Polignac number, because 127631328835613 - 2⁸ = 127631328835357 is a prime.

It is a super-2 number, since 2×127631328835613² (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 (127631328435613) 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, 1556479619906 + ... + 1556479619987.

It is an arithmetic number, because the mean of its divisors is an integer number (32686072018887).

Almost surely, 2^{127631328835613} is an apocalyptic number.

It is an amenable number.

127631328835613 is a deficient number, since it is larger than the sum of its proper divisors (3112959239935).

127631328835613 is an equidigital number, since it uses as much as digits as its factorization.

127631328835613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3112959239934.

The product of its digits is 26127360, while the sum is 59.

The spelling of 127631328835613 in words is "one hundred twenty-seven trillion, six hundred thirty-one billion, three hundred twenty-eight million, eight hundred thirty-five thousand, six hundred thirteen".