125280507617 has 8 divisors (see below), whose sum is σ = 129778112520. Its totient is φ = 120851568640.

The previous prime is 125280507563. The next prime is 125280507619. The reversal of 125280507617 is 716705082521.

It can be written as a sum of positive squares in 4 ways, for example, as 18309841 + 125262197776 = 4279^2 + 353924^2 .

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 125280507617 - 2⁶ = 125280507553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125280507619) 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, 17162768 + ... + 17170065.

It is an arithmetic number, because the mean of its divisors is an integer number (16222264065).

Almost surely, 2^125280507617 is an apocalyptic number.

It is an amenable number.

125280507617 is a deficient number, since it is larger than the sum of its proper divisors (4497604903).

125280507617 is an equidigital number, since it uses as much as digits as its factorization.

125280507617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34332963.

The product of its (nonzero) digits is 235200, while the sum is 44.

The spelling of 125280507617 in words is "one hundred twenty-five billion, two hundred eighty million, five hundred seven thousand, six hundred seventeen".