385808437663 has 16 divisors (see below), whose sum is σ = 434517783552. Its totient is φ = 339374808000.

The previous prime is 385808437649. The next prime is 385808437681. The reversal of 385808437663 is 366734808583.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385808437663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385808437603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2570808 + ... + 2716738.

It is an arithmetic number, because the mean of its divisors is an integer number (27157361472).

Almost surely, 2^385808437663 is an apocalyptic number.

385808437663 is a deficient number, since it is larger than the sum of its proper divisors (48709345889).

385808437663 is a wasteful number, since it uses less digits than its factorization.

385808437663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153726.

The product of its (nonzero) digits is 69672960, while the sum is 61.

The spelling of 385808437663 in words is "three hundred eighty-five billion, eight hundred eight million, four hundred thirty-seven thousand, six hundred sixty-three".