125440164205 has 8 divisors (see below), whose sum is σ = 150616287000. Its totient is φ = 100293404736.

The previous prime is 125440164167. The next prime is 125440164221. The reversal of 125440164205 is 502461044521.

It can be written as a sum of positive squares in 4 ways, for example, as 10501535529 + 114938628676 = 102477^2 + 339026^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125440164205 - 2¹³ = 125440156013 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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7331430 + ... + 7348519.

It is an arithmetic number, because the mean of its divisors is an integer number (18827035875).

Almost surely, 2^125440164205 is an apocalyptic number.

It is an amenable number.

125440164205 is a deficient number, since it is larger than the sum of its proper divisors (25176122795).

125440164205 is a wasteful number, since it uses less digits than its factorization.

125440164205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14681663.

The product of its (nonzero) digits is 38400, while the sum is 34.

The spelling of 125440164205 in words is "one hundred twenty-five billion, four hundred forty million, one hundred sixty-four thousand, two hundred five".