125115515105 has 16 divisors (see below), whose sum is σ = 171611871744. Its totient is φ = 85781056320.

The previous prime is 125115515101. The next prime is 125115515143. The reversal of 125115515105 is 501515511521.

It is not a de Polignac number, because 125115515105 - 2² = 125115515101 is a prime.

It is a super-2 number, since 2×125115515105² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125115515101) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 10982 + ... + 500351.

It is an arithmetic number, because the mean of its divisors is an integer number (10725741984).

Almost surely, 2^125115515105 is an apocalyptic number.

It is an amenable number.

125115515105 is a deficient number, since it is larger than the sum of its proper divisors (46496356639).

125115515105 is an equidigital number, since it uses as much as digits as its factorization.

125115515105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518336.

The product of its (nonzero) digits is 6250, while the sum is 32.

The spelling of 125115515105 in words is "one hundred twenty-five billion, one hundred fifteen million, five hundred fifteen thousand, one hundred five".