500661551125 has 16 divisors (see below), whose sum is σ = 624849015024. Its totient is φ = 400514241600.

The previous prime is 500661551099. The next prime is 500661551231. The reversal of 500661551125 is 521155166005.

It can be written as a sum of positive squares in 8 ways, for example, as 226841685841 + 273819865284 = 476279^2 + 523278^2 .

It is not a de Polignac number, because 500661551125 - 2³⁷ = 363222597653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4287007 + ... + 4402243.

It is an arithmetic number, because the mean of its divisors is an integer number (39053063439).

Almost surely, 2^500661551125 is an apocalyptic number.

It is an amenable number.

500661551125 is a deficient number, since it is larger than the sum of its proper divisors (124187463899).

500661551125 is a wasteful number, since it uses less digits than its factorization.

500661551125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150009 (or 149999 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 37.

The spelling of 500661551125 in words is "five hundred billion, six hundred sixty-one million, five hundred fifty-one thousand, one hundred twenty-five".