125904587791 has 4 divisors (see below), whose sum is σ = 133310740032. Its totient is φ = 118498435552.

The previous prime is 125904587779. The next prime is 125904587821. The reversal of 125904587791 is 197785409521.

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

It is a cyclic number.

It is not a de Polignac number, because 125904587791 - 2⁵ = 125904587759 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 (125904587701) 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, 3703076095 + ... + 3703076128.

It is an arithmetic number, because the mean of its divisors is an integer number (33327685008).

Almost surely, 2^125904587791 is an apocalyptic number.

125904587791 is a deficient number, since it is larger than the sum of its proper divisors (7406152241).

125904587791 is an equidigital number, since it uses as much as digits as its factorization.

125904587791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7406152240.

The product of its (nonzero) digits is 6350400, while the sum is 58.

The spelling of 125904587791 in words is "one hundred twenty-five billion, nine hundred four million, five hundred eighty-seven thousand, seven hundred ninety-one".