51612016573 has 4 divisors (see below), whose sum is σ = 55582171708. Its totient is φ = 47641861440.

The previous prime is 51612016559. The next prime is 51612016607. The reversal of 51612016573 is 37561021615.

51612016573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7157667609 + 44454348964 = 84603^2 + 210842^2 .

It is a cyclic number.

It is not a de Polignac number, because 51612016573 - 2²⁵ = 51578462141 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 (51612016523) 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, 1985077548 + ... + 1985077573.

It is an arithmetic number, because the mean of its divisors is an integer number (13895542927).

Almost surely, 2^51612016573 is an apocalyptic number.

It is an amenable number.

51612016573 is a deficient number, since it is larger than the sum of its proper divisors (3970155135).

51612016573 is a wasteful number, since it uses less digits than its factorization.

51612016573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3970155134.

The product of its (nonzero) digits is 37800, while the sum is 37.

The spelling of 51612016573 in words is "fifty-one billion, six hundred twelve million, sixteen thousand, five hundred seventy-three".