3918772785 has 32 divisors (see below), whose sum is σ = 6321733632. Its totient is φ = 2072848320.

The previous prime is 3918772783. The next prime is 3918772807. The reversal of 3918772785 is 5872778193.

3918772785 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3918772785 - 2¹ = 3918772783 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3918772783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1049592 + ... + 1053318.

It is an arithmetic number, because the mean of its divisors is an integer number (197554176).

Almost surely, 2^3918772785 is an apocalyptic number.

It is an amenable number.

3918772785 is a deficient number, since it is larger than the sum of its proper divisors (2402960847).

3918772785 is a wasteful number, since it uses less digits than its factorization.

3918772785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4293.

The product of its digits is 5927040, while the sum is 57.

The square root of 3918772785 is about 62600.1021165301. The cubic root of 3918772785 is about 1576.5824739839.

The spelling of 3918772785 in words is "three billion, nine hundred eighteen million, seven hundred seventy-two thousand, seven hundred eighty-five".