385811808551 has 24 divisors (see below), whose sum is σ = 426510730800. Its totient is φ = 346925652480.

The previous prime is 385811808527. The next prime is 385811808581. The reversal of 385811808551 is 155808118583.

It is not a de Polignac number, because 385811808551 - 2¹⁰ = 385811807527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 385811808493 and 385811808502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385811808581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14912675 + ... + 14938523.

It is an arithmetic number, because the mean of its divisors is an integer number (17771280450).

Almost surely, 2^385811808551 is an apocalyptic number.

385811808551 is a deficient number, since it is larger than the sum of its proper divisors (40698922249).

385811808551 is a wasteful number, since it uses less digits than its factorization.

385811808551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26627 (or 26586 counting only the distinct ones).

The product of its (nonzero) digits is 1536000, while the sum is 53.

The spelling of 385811808551 in words is "three hundred eighty-five billion, eight hundred eleven million, eight hundred eight thousand, five hundred fifty-one".