385787615687 has 4 divisors (see below), whose sum is σ = 386423180736. Its totient is φ = 385152050640.

The previous prime is 385787615651. The next prime is 385787615693. The reversal of 385787615687 is 786516787583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 786516787583 = 5741 ⋅136999963.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385787615687 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 385787615687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385787615287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317781614 + ... + 317782827.

It is an arithmetic number, because the mean of its divisors is an integer number (96605795184).

Almost surely, 2^385787615687 is an apocalyptic number.

385787615687 is a deficient number, since it is larger than the sum of its proper divisors (635565049).

385787615687 is an equidigital number, since it uses as much as digits as its factorization.

385787615687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635565048.

The product of its digits is 474163200, while the sum is 71.

The spelling of 385787615687 in words is "three hundred eighty-five billion, seven hundred eighty-seven million, six hundred fifteen thousand, six hundred eighty-seven".