51455825563 has 2 divisors, whose sum is σ = 51455825564. Its totient is φ = 51455825562.

The previous prime is 51455825521. The next prime is 51455825569. The reversal of 51455825563 is 36552855415.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51455825563 is a prime.

It is not a weakly prime, because it can be changed into another prime (51455825569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25727912781 + 25727912782.

It is an arithmetic number, because the mean of its divisors is an integer number (25727912782).

Almost surely, 2^51455825563 is an apocalyptic number.

51455825563 is a deficient number, since it is larger than the sum of its proper divisors (1).

51455825563 is an equidigital number, since it uses as much as digits as its factorization.

51455825563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600000, while the sum is 49.

The spelling of 51455825563 in words is "fifty-one billion, four hundred fifty-five million, eight hundred twenty-five thousand, five hundred sixty-three".