125423538547 has 4 divisors (see below), whose sum is σ = 126533481480. Its totient is φ = 124313595616.

The previous prime is 125423538529. The next prime is 125423538599. The reversal of 125423538547 is 745835324521.

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-125423538547 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 125423538547.

It is not an unprimeable number, because it can be changed into a prime (125423538047) 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, 554971297 + ... + 554971522.

It is an arithmetic number, because the mean of its divisors is an integer number (31633370370).

Almost surely, 2^125423538547 is an apocalyptic number.

125423538547 is a deficient number, since it is larger than the sum of its proper divisors (1109942933).

125423538547 is a wasteful number, since it uses less digits than its factorization.

125423538547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109942932.

The product of its digits is 4032000, while the sum is 49.

The spelling of 125423538547 in words is "one hundred twenty-five billion, four hundred twenty-three million, five hundred thirty-eight thousand, five hundred forty-seven".