3806778728127 has 16 divisors (see below), whose sum is σ = 5218277115392. Its totient is φ = 2466708279840.

The previous prime is 3806778728111. The next prime is 3806778728153. The reversal of 3806778728127 is 7218278776083.

It is not a de Polignac number, because 3806778728127 - 2⁴ = 3806778728111 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 (3806778728227) 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, 17625499 + ... + 17840172.

It is an arithmetic number, because the mean of its divisors is an integer number (326142319712).

Almost surely, 2^{3806778728127} is an apocalyptic number.

3806778728127 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

3806778728127 is a deficient number, since it is larger than the sum of its proper divisors (1411498387265).

3806778728127 is a wasteful number, since it uses less digits than its factorization.

3806778728127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35466678.

The product of its (nonzero) digits is 88510464, while the sum is 66.

The spelling of 3806778728127 in words is "three trillion, eight hundred six billion, seven hundred seventy-eight million, seven hundred twenty-eight thousand, one hundred twenty-seven".