125635453117 has 4 divisors (see below), whose sum is σ = 125636301756. Its totient is φ = 125634604480.

The previous prime is 125635453093. The next prime is 125635453127. The reversal of 125635453117 is 711354536521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 81342462436 + 44292990681 = 285206^2 + 210459^2 .

It is a cyclic number.

It is not a de Polignac number, because 125635453117 - 2³¹ = 123487969469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125635453127) 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, 137734 + ... + 519847.

It is an arithmetic number, because the mean of its divisors is an integer number (31409075439).

Almost surely, 2^125635453117 is an apocalyptic number.

It is an amenable number.

125635453117 is a deficient number, since it is larger than the sum of its proper divisors (848639).

125635453117 is an equidigital number, since it uses as much as digits as its factorization.

125635453117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848638.

The product of its digits is 378000, while the sum is 43.

Adding to 125635453117 its reverse (711354536521), we get a palindrome (836989989638).

The spelling of 125635453117 in words is "one hundred twenty-five billion, six hundred thirty-five million, four hundred fifty-three thousand, one hundred seventeen".