3856356661687 has 8 divisors (see below), whose sum is σ = 4150138896432. Its totient is φ = 3570011952000.

The previous prime is 3856356661669. The next prime is 3856356661697. The reversal of 3856356661687 is 7861666536583.

3856356661687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3856356661687 - 2¹⁹ = 3856356137399 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 (3856356661697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1859380189 + ... + 1859382262.

It is an arithmetic number, because the mean of its divisors is an integer number (518767362054).

Almost surely, 2^{3856356661687} is an apocalyptic number.

3856356661687 is a deficient number, since it is larger than the sum of its proper divisors (293782234745).

3856356661687 is a wasteful number, since it uses less digits than its factorization.

3856356661687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3718762529.

The product of its digits is 783820800, while the sum is 70.

The spelling of 3856356661687 in words is "three trillion, eight hundred fifty-six billion, three hundred fifty-six million, six hundred sixty-one thousand, six hundred eighty-seven".