127505025777601 has 4 divisors (see below), whose sum is σ = 130951107555412. Its totient is φ = 124058943999792.

The previous prime is 127505025777599. The next prime is 127505025777659. The reversal of 127505025777601 is 106777520505721.

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 115122685266576 + 12382340511025 = 10729524^2 + 3518855^2 .

It is a cyclic number.

It is not a de Polignac number, because 127505025777601 - 2¹ = 127505025777599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127505025777691) 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, 1723040888850 + ... + 1723040888923.

It is an arithmetic number, because the mean of its divisors is an integer number (32737776888853).

Almost surely, 2^{127505025777601} is an apocalyptic number.

It is an amenable number.

127505025777601 is a deficient number, since it is larger than the sum of its proper divisors (3446081777811).

127505025777601 is an equidigital number, since it uses as much as digits as its factorization.

127505025777601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3446081777810.

The product of its (nonzero) digits is 7203000, while the sum is 55.

The spelling of 127505025777601 in words is "one hundred twenty-seven trillion, five hundred five billion, twenty-five million, seven hundred seventy-seven thousand, six hundred one".