125906111919 has 12 divisors (see below), whose sum is σ = 207845010256. Its totient is φ = 71946349632.

The previous prime is 125906111899. The next prime is 125906111951. The reversal of 125906111919 is 919111609521.

It is a happy number.

125906111919 is a `hidden beast` number, since 1 + 2 + 5 + 9 + 0 + 611 + 19 + 19 = 666.

It is not a de Polignac number, because 125906111919 - 2³² = 121611144623 is a prime.

It is a super-2 number, since 2×125906111919² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125906111959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 999254794 + ... + 999254919.

Almost surely, 2^125906111919 is an apocalyptic number.

125906111919 is a deficient number, since it is larger than the sum of its proper divisors (81938898337).

125906111919 is a wasteful number, since it uses less digits than its factorization.

125906111919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998509726 (or 1998509723 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 45.

The spelling of 125906111919 in words is "one hundred twenty-five billion, nine hundred six million, one hundred eleven thousand, nine hundred nineteen".