125166291650 has 12 divisors (see below), whose sum is σ = 232809302562. Its totient is φ = 50066516640.

The previous prime is 125166291643. The next prime is 125166291673. The reversal of 125166291650 is 56192661521.

It can be written as a sum of positive squares in 3 ways, for example, as 48508741009 + 76657550641 = 220247^2 + 276871^2 .

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 5 ways as a sum of consecutive naturals, for example, 1251662867 + ... + 1251662966.

Almost surely, 2^125166291650 is an apocalyptic number.

125166291650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125166291650 is a deficient number, since it is larger than the sum of its proper divisors (107643010912).

125166291650 is a wasteful number, since it uses less digits than its factorization.

125166291650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2503325845 (or 2503325840 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 125166291650 in words is "one hundred twenty-five billion, one hundred sixty-six million, two hundred ninety-one thousand, six hundred fifty".