51664007573 has 8 divisors (see below), whose sum is σ = 56181528792. Its totient is φ = 47310759936.

The previous prime is 51664007561. The next prime is 51664007579. The reversal of 51664007573 is 37570046615.

It can be written as a sum of positive squares in 4 ways, for example, as 12151314289 + 39512693284 = 110233^2 + 198778^2 .

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 51664007573 - 2⁶ = 51664007509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51664007579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41067740 + ... + 41068997.

It is an arithmetic number, because the mean of its divisors is an integer number (7022691099).

Almost surely, 2^51664007573 is an apocalyptic number.

It is an amenable number.

51664007573 is a deficient number, since it is larger than the sum of its proper divisors (4517521219).

51664007573 is a wasteful number, since it uses less digits than its factorization.

51664007573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82136791.

The product of its (nonzero) digits is 529200, while the sum is 44.

The spelling of 51664007573 in words is "fifty-one billion, six hundred sixty-four million, seven thousand, five hundred seventy-three".