51049919933 has 2 divisors, whose sum is σ = 51049919934. Its totient is φ = 51049919932.

The previous prime is 51049919911. The next prime is 51049919957. The reversal of 51049919933 is 33991994015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48965723524 + 2084196409 = 221282^2 + 45653^2 .

It is a cyclic number.

It is not a de Polignac number, because 51049919933 - 2²² = 51045725629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51049919233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25524959966 + 25524959967.

It is an arithmetic number, because the mean of its divisors is an integer number (25524959967).

Almost surely, 2^51049919933 is an apocalyptic number.

It is an amenable number.

51049919933 is a deficient number, since it is larger than the sum of its proper divisors (1).

51049919933 is an equidigital number, since it uses as much as digits as its factorization.

51049919933 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1180980, while the sum is 53.

The spelling of 51049919933 in words is "fifty-one billion, forty-nine million, nine hundred nineteen thousand, nine hundred thirty-three".