125188109993 has 4 divisors (see below), whose sum is σ = 125217702528. Its totient is φ = 125158517460.

The previous prime is 125188109971. The next prime is 125188110011. The reversal of 125188109993 is 399901881521.

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: 399901881521 = 23 ⋅17387038327.

It is a cyclic number.

It is not a de Polignac number, because 125188109993 - 2¹⁸ = 125187847849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125188103993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14789921 + ... + 14798382.

It is an arithmetic number, because the mean of its divisors is an integer number (31304425632).

Almost surely, 2^125188109993 is an apocalyptic number.

It is an amenable number.

125188109993 is a deficient number, since it is larger than the sum of its proper divisors (29592535).

125188109993 is an equidigital number, since it uses as much as digits as its factorization.

125188109993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29592534.

The product of its (nonzero) digits is 1399680, while the sum is 56.

The spelling of 125188109993 in words is "one hundred twenty-five billion, one hundred eighty-eight million, one hundred nine thousand, nine hundred ninety-three".