51864299061 has 4 divisors (see below), whose sum is σ = 69152398752. Its totient is φ = 34576199372.

The previous prime is 51864299041. The next prime is 51864299077. The reversal of 51864299061 is 16099246815.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51864299061 - 2¹¹ = 51864297013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51864298995 and 51864299013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51864299021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8644049841 + ... + 8644049846.

It is an arithmetic number, because the mean of its divisors is an integer number (17288099688).

Almost surely, 2^51864299061 is an apocalyptic number.

It is an amenable number.

51864299061 is a deficient number, since it is larger than the sum of its proper divisors (17288099691).

51864299061 is a wasteful number, since it uses less digits than its factorization.

51864299061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17288099690.

The product of its (nonzero) digits is 933120, while the sum is 51.

The spelling of 51864299061 in words is "fifty-one billion, eight hundred sixty-four million, two hundred ninety-nine thousand, sixty-one".