125016408817 has 4 divisors (see below), whose sum is σ = 132370315236. Its totient is φ = 117662502400.

The previous prime is 125016408809. The next prime is 125016408841. The reversal of 125016408817 is 718804610521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 117089889856 + 7926518961 = 342184^2 + 89031^2 .

It is a cyclic number.

It is not a de Polignac number, because 125016408817 - 2³ = 125016408809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125016108817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3676953184 + ... + 3676953217.

It is an arithmetic number, because the mean of its divisors is an integer number (33092578809).

Almost surely, 2^125016408817 is an apocalyptic number.

125016408817 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

125016408817 is a deficient number, since it is larger than the sum of its proper divisors (7353906419).

125016408817 is an equidigital number, since it uses as much as digits as its factorization.

125016408817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7353906418.

The product of its (nonzero) digits is 107520, while the sum is 43.

The spelling of 125016408817 in words is "one hundred twenty-five billion, sixteen million, four hundred eight thousand, eight hundred seventeen".