51451956841 has 2 divisors, whose sum is σ = 51451956842. Its totient is φ = 51451956840.

The previous prime is 51451956839. The next prime is 51451956929. The reversal of 51451956841 is 14865915415.

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., 41271954025 + 10180002816 = 203155^2 + 100896^2 .

It is a cyclic number.

It is not a de Polignac number, because 51451956841 - 2¹ = 51451956839 is a prime.

Together with 51451956839, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51451956811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25725978420 + 25725978421.

It is an arithmetic number, because the mean of its divisors is an integer number (25725978421).

Almost surely, 2^51451956841 is an apocalyptic number.

It is an amenable number.

51451956841 is a deficient number, since it is larger than the sum of its proper divisors (1).

51451956841 is an equidigital number, since it uses as much as digits as its factorization.

51451956841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864000, while the sum is 49.

The spelling of 51451956841 in words is "fifty-one billion, four hundred fifty-one million, nine hundred fifty-six thousand, eight hundred forty-one".