51840917833 has 2 divisors, whose sum is σ = 51840917834. Its totient is φ = 51840917832.

The previous prime is 51840917831. The next prime is 51840917861. The reversal of 51840917833 is 33871904815.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48640979209 + 3199938624 = 220547^2 + 56568^2 .

It is a cyclic number.

It is not a de Polignac number, because 51840917833 - 2¹ = 51840917831 is a prime.

Together with 51840917831, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51840917831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25920458916 + 25920458917.

It is an arithmetic number, because the mean of its divisors is an integer number (25920458917).

Almost surely, 2^51840917833 is an apocalyptic number.

It is an amenable number.

51840917833 is a deficient number, since it is larger than the sum of its proper divisors (1).

51840917833 is an equidigital number, since it uses as much as digits as its factorization.

51840917833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 51840917833 in words is "fifty-one billion, eight hundred forty million, nine hundred seventeen thousand, eight hundred thirty-three".