51646873331 has 2 divisors, whose sum is σ = 51646873332. Its totient is φ = 51646873330.

The previous prime is 51646873277. The next prime is 51646873357. The reversal of 51646873331 is 13337864615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51646873331 - 2³⁰ = 50573131507 is a prime.

It is a super-2 number, since 2×51646873331² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51646803331) 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 as a sum of consecutive naturals, namely, 25823436665 + 25823436666.

It is an arithmetic number, because the mean of its divisors is an integer number (25823436666).

Almost surely, 2^51646873331 is an apocalyptic number.

51646873331 is a deficient number, since it is larger than the sum of its proper divisors (1).

51646873331 is an equidigital number, since it uses as much as digits as its factorization.

51646873331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 47.

The spelling of 51646873331 in words is "fifty-one billion, six hundred forty-six million, eight hundred seventy-three thousand, three hundred thirty-one".