51380087893 has 2 divisors, whose sum is σ = 51380087894. Its totient is φ = 51380087892.

The previous prime is 51380087881. The next prime is 51380087929. The reversal of 51380087893 is 39878008315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51203543524 + 176544369 = 226282^2 + 13287^2 .

It is a cyclic number.

It is not a de Polignac number, because 51380087893 - 2¹³ = 51380079701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51380087893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51380057893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25690043946 + 25690043947.

It is an arithmetic number, because the mean of its divisors is an integer number (25690043947).

Almost surely, 2^51380087893 is an apocalyptic number.

It is an amenable number.

51380087893 is a deficient number, since it is larger than the sum of its proper divisors (1).

51380087893 is an equidigital number, since it uses as much as digits as its factorization.

51380087893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 51380087893 in words is "fifty-one billion, three hundred eighty million, eighty-seven thousand, eight hundred ninety-three".