125280475809 has 16 divisors (see below), whose sum is σ = 170796021312. Its totient is φ = 81663372288.

The previous prime is 125280475799. The next prime is 125280475811. The reversal of 125280475809 is 908574082521.

It is not a de Polignac number, because 125280475809 - 2⁷ = 125280475681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125280475889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2569324 + ... + 2617629.

It is an arithmetic number, because the mean of its divisors is an integer number (10674751332).

Almost surely, 2^125280475809 is an apocalyptic number.

It is an amenable number.

125280475809 is a deficient number, since it is larger than the sum of its proper divisors (45515545503).

125280475809 is an equidigital number, since it uses as much as digits as its factorization.

125280475809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5187136.

The product of its (nonzero) digits is 1612800, while the sum is 51.

The spelling of 125280475809 in words is "one hundred twenty-five billion, two hundred eighty million, four hundred seventy-five thousand, eight hundred nine".