125251661210 has 48 divisors (see below), whose sum is σ = 244822320504. Its totient is φ = 46115536896.

The previous prime is 125251661191. The next prime is 125251661251. The reversal of 125251661210 is 12166152521.

It can be written as a sum of positive squares in 12 ways, for example, as 15672786481 + 109578874729 = 125191^2 + 331027^2 .

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 491594 + ... + 701546.

Almost surely, 2^125251661210 is an apocalyptic number.

125251661210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125251661210 is a deficient number, since it is larger than the sum of its proper divisors (119570659294).

125251661210 is a wasteful number, since it uses less digits than its factorization.

125251661210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210339 (or 210326 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 125251661210 in words is "one hundred twenty-five billion, two hundred fifty-one million, six hundred sixty-one thousand, two hundred ten".