125827778073 has 16 divisors (see below), whose sum is σ = 173281673216. Its totient is φ = 81132639120.

The previous prime is 125827778059. The next prime is 125827778093. The reversal of 125827778073 is 370877728521.

It is a happy number.

It is not a de Polignac number, because 125827778073 - 2⁹ = 125827777561 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125827778003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224761 + ... + 549702.

It is an arithmetic number, because the mean of its divisors is an integer number (10830104576).

Almost surely, 2^125827778073 is an apocalyptic number.

It is an amenable number.

125827778073 is a deficient number, since it is larger than the sum of its proper divisors (47453895143).

125827778073 is a wasteful number, since it uses less digits than its factorization.

125827778073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776244.

The product of its (nonzero) digits is 9219840, while the sum is 57.

The spelling of 125827778073 in words is "one hundred twenty-five billion, eight hundred twenty-seven million, seven hundred seventy-eight thousand, seventy-three".