51649535933 has 2 divisors, whose sum is σ = 51649535934. Its totient is φ = 51649535932.

The previous prime is 51649535923. The next prime is 51649536013. The reversal of 51649535933 is 33953594615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39088057849 + 12561478084 = 197707^2 + 112078^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51649535933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51649535923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25824767966 + 25824767967.

It is an arithmetic number, because the mean of its divisors is an integer number (25824767967).

Almost surely, 2^51649535933 is an apocalyptic number.

It is an amenable number.

51649535933 is a deficient number, since it is larger than the sum of its proper divisors (1).

51649535933 is an equidigital number, since it uses as much as digits as its factorization.

51649535933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6561000, while the sum is 53.

The spelling of 51649535933 in words is "fifty-one billion, six hundred forty-nine million, five hundred thirty-five thousand, nine hundred thirty-three".