51246303861 has 4 divisors (see below), whose sum is σ = 68328405152. Its totient is φ = 34164202572.

The previous prime is 51246303827. The next prime is 51246303919. The reversal of 51246303861 is 16830364215.

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 not a de Polignac number, because 51246303861 - 2¹⁵ = 51246271093 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 (51246303061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8541050641 + ... + 8541050646.

It is an arithmetic number, because the mean of its divisors is an integer number (17082101288).

Almost surely, 2^51246303861 is an apocalyptic number.

It is an amenable number.

51246303861 is a deficient number, since it is larger than the sum of its proper divisors (17082101291).

51246303861 is a wasteful number, since it uses less digits than its factorization.

51246303861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17082101290.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 51246303861 in words is "fifty-one billion, two hundred forty-six million, three hundred three thousand, eight hundred sixty-one".