125111665533 has 4 divisors (see below), whose sum is σ = 166815554048. Its totient is φ = 83407777020.

The previous prime is 125111665507. The next prime is 125111665561. The reversal of 125111665533 is 335566111521.

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, and also an emirpimes, since its reverse is a distinct semiprime: 335566111521 = 3 ⋅111855370507.

It is not a de Polignac number, because 125111665533 - 2⁸ = 125111665277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125111665491 and 125111665500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125111665573) 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, 20851944253 + ... + 20851944258.

It is an arithmetic number, because the mean of its divisors is an integer number (41703888512).

Almost surely, 2^125111665533 is an apocalyptic number.

It is an amenable number.

125111665533 is a deficient number, since it is larger than the sum of its proper divisors (41703888515).

125111665533 is an equidigital number, since it uses as much as digits as its factorization.

125111665533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41703888514.

The product of its digits is 81000, while the sum is 39.

The spelling of 125111665533 in words is "one hundred twenty-five billion, one hundred eleven million, six hundred sixty-five thousand, five hundred thirty-three".