125540712897 has 4 divisors (see below), whose sum is σ = 167387617200. Its totient is φ = 83693808596.

The previous prime is 125540712893. The next prime is 125540712907. The reversal of 125540712897 is 798217045521.

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 125540712897 - 2² = 125540712893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125540712893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20923452147 + ... + 20923452152.

It is an arithmetic number, because the mean of its divisors is an integer number (41846904300).

Almost surely, 2^125540712897 is an apocalyptic number.

It is an amenable number.

125540712897 is a deficient number, since it is larger than the sum of its proper divisors (41846904303).

125540712897 is an equidigital number, since it uses as much as digits as its factorization.

125540712897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41846904302.

The product of its (nonzero) digits is 1411200, while the sum is 51.

The spelling of 125540712897 in words is "one hundred twenty-five billion, five hundred forty million, seven hundred twelve thousand, eight hundred ninety-seven".