385439687551 has 2 divisors, whose sum is σ = 385439687552. Its totient is φ = 385439687550.

The previous prime is 385439687537. The next prime is 385439687569. The reversal of 385439687551 is 155786934583.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 385439687551 - 2²³ = 385431298943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385439687051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192719843775 + 192719843776.

It is an arithmetic number, because the mean of its divisors is an integer number (192719843776).

Almost surely, 2^385439687551 is an apocalyptic number.

385439687551 is a deficient number, since it is larger than the sum of its proper divisors (1).

385439687551 is an equidigital number, since it uses as much as digits as its factorization.

385439687551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864000, while the sum is 64.

The spelling of 385439687551 in words is "three hundred eighty-five billion, four hundred thirty-nine million, six hundred eighty-seven thousand, five hundred fifty-one".