3856492691039 has 16 divisors (see below), whose sum is σ = 3935610581760. Its totient is φ = 3778191943680.

The previous prime is 3856492691021. The next prime is 3856492691059. The reversal of 3856492691039 is 9301962946583.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3856492691039 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 (3856492691059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31789979 + ... + 31911059.

It is an arithmetic number, because the mean of its divisors is an integer number (245975661360).

Almost surely, 2^{3856492691039} is an apocalyptic number.

3856492691039 is a deficient number, since it is larger than the sum of its proper divisors (79117890721).

3856492691039 is a wasteful number, since it uses less digits than its factorization.

3856492691039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124450.

The product of its (nonzero) digits is 75582720, while the sum is 65.

The spelling of 3856492691039 in words is "three trillion, eight hundred fifty-six billion, four hundred ninety-two million, six hundred ninety-one thousand, thirty-nine".