125057410561 has 4 divisors (see below), whose sum is σ = 125190877252. Its totient is φ = 124923943872.

The previous prime is 125057410559. The next prime is 125057410567. The reversal of 125057410561 is 165014750521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165014750521 = 4019 ⋅41058659.

It can be written as a sum of positive squares in 2 ways, for example, as 67161832336 + 57895578225 = 259156^2 + 240615^2 .

It is a cyclic number.

It is not a de Polignac number, because 125057410561 - 2¹ = 125057410559 is a prime.

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 125057410561.

It is not an unprimeable number, because it can be changed into a prime (125057410567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66731940 + ... + 66733813.

It is an arithmetic number, because the mean of its divisors is an integer number (31297719313).

Almost surely, 2^125057410561 is an apocalyptic number.

It is an amenable number.

125057410561 is a deficient number, since it is larger than the sum of its proper divisors (133466691).

125057410561 is an equidigital number, since it uses as much as digits as its factorization.

125057410561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133466690.

The product of its (nonzero) digits is 42000, while the sum is 37.

The spelling of 125057410561 in words is "one hundred twenty-five billion, fifty-seven million, four hundred ten thousand, five hundred sixty-one".