125073945919 has 4 divisors (see below), whose sum is σ = 134695018696. Its totient is φ = 115452873144.

The previous prime is 125073945917. The next prime is 125073945947. The reversal of 125073945919 is 919549370521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125073945919 - 2¹ = 125073945917 is a prime.

It is a super-2 number, since 2×125073945919² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125073945919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125073945917) 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, 4810536369 + ... + 4810536394.

It is an arithmetic number, because the mean of its divisors is an integer number (33673754674).

Almost surely, 2^125073945919 is an apocalyptic number.

125073945919 is a deficient number, since it is larger than the sum of its proper divisors (9621072777).

125073945919 is an equidigital number, since it uses as much as digits as its factorization.

125073945919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9621072776.

The product of its (nonzero) digits is 3061800, while the sum is 55.

The spelling of 125073945919 in words is "one hundred twenty-five billion, seventy-three million, nine hundred forty-five thousand, nine hundred nineteen".