51573955787 has 2 divisors, whose sum is σ = 51573955788. Its totient is φ = 51573955786.

The previous prime is 51573955777. The next prime is 51573955933. The reversal of 51573955787 is 78755937515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51573955787 - 2²⁴ = 51557178571 is a prime.

It is not a weakly prime, because it can be changed into another prime (51573955777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25786977893 + 25786977894.

It is an arithmetic number, because the mean of its divisors is an integer number (25786977894).

Almost surely, 2^51573955787 is an apocalyptic number.

51573955787 is a deficient number, since it is larger than the sum of its proper divisors (1).

51573955787 is an equidigital number, since it uses as much as digits as its factorization.

51573955787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46305000, while the sum is 62.

The spelling of 51573955787 in words is "fifty-one billion, five hundred seventy-three million, nine hundred fifty-five thousand, seven hundred eighty-seven".