51126660533 has 8 divisors (see below), whose sum is σ = 55061370168. Its totient is φ = 47192220864.

The previous prime is 51126660527. The next prime is 51126660547. The reversal of 51126660533 is 33506662115.

It can be written as a sum of positive squares in 4 ways, for example, as 12310568209 + 38816092324 = 110953^2 + 197018^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51126660533 - 2⁴ = 51126660517 is a prime.

It is a super-2 number, since 2×51126660533² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51126660553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507035 + ... + 599447.

It is an arithmetic number, because the mean of its divisors is an integer number (6882671271).

Almost surely, 2^51126660533 is an apocalyptic number.

It is an amenable number.

51126660533 is a deficient number, since it is larger than the sum of its proper divisors (3934709635).

51126660533 is a wasteful number, since it uses less digits than its factorization.

51126660533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134983.

The product of its (nonzero) digits is 97200, while the sum is 38.

The spelling of 51126660533 in words is "fifty-one billion, one hundred twenty-six million, six hundred sixty thousand, five hundred thirty-three".