127581725613 has 16 divisors (see below), whose sum is σ = 180634466880. Its totient is φ = 79820572416.

The previous prime is 127581725603. The next prime is 127581725641. The reversal of 127581725613 is 316527185721.

It is not a de Polignac number, because 127581725613 - 2¹² = 127581721517 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127581725603) 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, 3586918 + ... + 3622311.

It is an arithmetic number, because the mean of its divisors is an integer number (11289654180).

Almost surely, 2^127581725613 is an apocalyptic number.

It is an amenable number.

127581725613 is a deficient number, since it is larger than the sum of its proper divisors (53052741267).

127581725613 is a wasteful number, since it uses less digits than its factorization.

127581725613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7209596.

The product of its digits is 705600, while the sum is 48.

It can be divided in two parts, 12758 and 1725613, that added together give a palindrome (1738371).

The spelling of 127581725613 in words is "one hundred twenty-seven billion, five hundred eighty-one million, seven hundred twenty-five thousand, six hundred thirteen".