51751650289 has 4 divisors (see below), whose sum is σ = 51753586420. Its totient is φ = 51749714160.

The previous prime is 51751650239. The next prime is 51751650331. The reversal of 51751650289 is 98205615715.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32845400289 + 18906250000 = 181233^2 + 137500^2 .

It is a cyclic number.

It is not a de Polignac number, because 51751650289 - 2⁷ = 51751650161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51751650239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 927402 + ... + 981619.

It is an arithmetic number, because the mean of its divisors is an integer number (12938396605).

Almost surely, 2^51751650289 is an apocalyptic number.

It is an amenable number.

51751650289 is a deficient number, since it is larger than the sum of its proper divisors (1936131).

51751650289 is a wasteful number, since it uses less digits than its factorization.

51751650289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1936130.

The product of its (nonzero) digits is 756000, while the sum is 49.

The spelling of 51751650289 in words is "fifty-one billion, seven hundred fifty-one million, six hundred fifty thousand, two hundred eighty-nine".