125564561058191 has 4 divisors (see below), whose sum is σ = 125569797957552. Its totient is φ = 125559324158832.

The previous prime is 125564561058161. The next prime is 125564561058199. The reversal of 125564561058191 is 191850165465521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125564561058191 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 125564561058191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125564561058199) 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, 2618413715 + ... + 2618461668.

It is an arithmetic number, because the mean of its divisors is an integer number (31392449489388).

Almost surely, 2^{125564561058191} is an apocalyptic number.

125564561058191 is a deficient number, since it is larger than the sum of its proper divisors (5236899361).

125564561058191 is an equidigital number, since it uses as much as digits as its factorization.

125564561058191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5236899360.

The product of its (nonzero) digits is 12960000, while the sum is 59.

The spelling of 125564561058191 in words is "one hundred twenty-five trillion, five hundred sixty-four billion, five hundred sixty-one million, fifty-eight thousand, one hundred ninety-one".