125540123445309 has 8 divisors (see below), whose sum is σ = 167388740219232. Its totient is φ = 83692461150800.

The previous prime is 125540123445277. The next prime is 125540123445313. The reversal of 125540123445309 is 903544321045521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125540123445309 - 2⁵ = 125540123445277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125540123445329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238312899 + ... + 238839104.

It is an arithmetic number, because the mean of its divisors is an integer number (20923592527404).

Almost surely, 2^{125540123445309} is an apocalyptic number.

It is an amenable number.

125540123445309 is a deficient number, since it is larger than the sum of its proper divisors (41848616773923).

125540123445309 is an equidigital number, since it uses as much as digits as its factorization.

125540123445309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477239707.

The product of its (nonzero) digits is 2592000, while the sum is 48.

The spelling of 125540123445309 in words is "one hundred twenty-five trillion, five hundred forty billion, one hundred twenty-three million, four hundred forty-five thousand, three hundred nine".