125203660015 has 12 divisors (see below), whose sum is σ = 174774089016. Its totient is φ = 85853938128.

The previous prime is 125203660003. The next prime is 125203660019. The reversal of 125203660015 is 510066302521.

It is not a de Polignac number, because 125203660015 - 2⁷ = 125203659887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125203660019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 255517429 + ... + 255517918.

It is an arithmetic number, because the mean of its divisors is an integer number (14564507418).

Almost surely, 2^125203660015 is an apocalyptic number.

125203660015 is a deficient number, since it is larger than the sum of its proper divisors (49570429001).

125203660015 is an equidigital number, since it uses as much as digits as its factorization.

125203660015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511035366 (or 511035359 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 125203660015 its reverse (510066302521), we get a palindrome (635269962536).

The spelling of 125203660015 in words is "one hundred twenty-five billion, two hundred three million, six hundred sixty thousand, fifteen".