3806807836557 has 16 divisors (see below), whose sum is σ = 5537244810240. Its totient is φ = 2307127191600.

The previous prime is 3806807836549. The next prime is 3806807836561. The reversal of 3806807836557 is 7556387086083.

It is not a de Polignac number, because 3806807836557 - 2³ = 3806807836549 is a prime.

It is a super-2 number, since 2×3806807836557² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3806807836157) 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, 2095182 + ... + 3464592.

It is an arithmetic number, because the mean of its divisors is an integer number (346077800640).

Almost surely, 2^{3806807836557} is an apocalyptic number.

It is an amenable number.

3806807836557 is a deficient number, since it is larger than the sum of its proper divisors (1730436973683).

3806807836557 is a wasteful number, since it uses less digits than its factorization.

3806807836557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453664.

The product of its (nonzero) digits is 203212800, while the sum is 66.

The spelling of 3806807836557 in words is "three trillion, eight hundred six billion, eight hundred seven million, eight hundred thirty-six thousand, five hundred fifty-seven".