125655216613 has 4 divisors (see below), whose sum is σ = 125793148608. Its totient is φ = 125517284620.

The previous prime is 125655216581. The next prime is 125655216619. The reversal of 125655216613 is 316612556521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125655216613 - 2⁵ = 125655216581 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125655216613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125655216619) 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, 68964631 + ... + 68966452.

It is an arithmetic number, because the mean of its divisors is an integer number (31448287152).

Almost surely, 2^125655216613 is an apocalyptic number.

It is an amenable number.

125655216613 is a deficient number, since it is larger than the sum of its proper divisors (137931995).

125655216613 is an equidigital number, since it uses as much as digits as its factorization.

125655216613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137931994.

The product of its digits is 324000, while the sum is 43.

The spelling of 125655216613 in words is "one hundred twenty-five billion, six hundred fifty-five million, two hundred sixteen thousand, six hundred thirteen".