125359899845 has 4 divisors (see below), whose sum is σ = 150431879820. Its totient is φ = 100287919872.

The previous prime is 125359899829. The next prime is 125359899893. The reversal of 125359899845 is 548998953521.

It is a Cunningham number, because it is equal to 354062²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 548998953521 = 328637 ⋅1670533.

It can be written as a sum of positive squares in 2 ways, for example, as 45129903844 + 80229996001 = 212438^2 + 283249^2 .

It is a cyclic number.

It is not a de Polignac number, because 125359899845 - 2⁴ = 125359899829 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 12535989980 + ... + 12535989989.

It is an arithmetic number, because the mean of its divisors is an integer number (37607969955).

Almost surely, 2^125359899845 is an apocalyptic number.

It is an amenable number.

125359899845 is a deficient number, since it is larger than the sum of its proper divisors (25071979975).

125359899845 is an equidigital number, since it uses as much as digits as its factorization.

125359899845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25071979974.

The product of its digits is 139968000, while the sum is 68.

The spelling of 125359899845 in words is "one hundred twenty-five billion, three hundred fifty-nine million, eight hundred ninety-nine thousand, eight hundred forty-five".