51803776573 has 2 divisors, whose sum is σ = 51803776574. Its totient is φ = 51803776572.

The previous prime is 51803776559. The next prime is 51803776679. The reversal of 51803776573 is 37567730815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32505565849 + 19298210724 = 180293^2 + 138918^2 .

It is a cyclic number.

It is not a de Polignac number, because 51803776573 - 2¹⁷ = 51803645501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51803776573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51803776523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25901888286 + 25901888287.

It is an arithmetic number, because the mean of its divisors is an integer number (25901888287).

Almost surely, 2^51803776573 is an apocalyptic number.

It is an amenable number.

51803776573 is a deficient number, since it is larger than the sum of its proper divisors (1).

51803776573 is an equidigital number, since it uses as much as digits as its factorization.

51803776573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3704400, while the sum is 52.

The spelling of 51803776573 in words is "fifty-one billion, eight hundred three million, seven hundred seventy-six thousand, five hundred seventy-three".