3905777342985 has 32 divisors (see below), whose sum is σ = 7171875717120. Its totient is φ = 1778027498688.

The previous prime is 3905777342983. The next prime is 3905777343011. The reversal of 3905777342985 is 5892437775093.

It is not a de Polignac number, because 3905777342985 - 2¹ = 3905777342983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3905777342981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77794737 + ... + 77844926.

It is an arithmetic number, because the mean of its divisors is an integer number (224121116160).

Almost surely, 2^{3905777342985} is an apocalyptic number.

3905777342985 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3905777342985 is a deficient number, since it is larger than the sum of its proper divisors (3266098374135).

3905777342985 is a wasteful number, since it uses less digits than its factorization.

3905777342985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155639917.

The product of its (nonzero) digits is 400075200, while the sum is 69.

The spelling of 3905777342985 in words is "three trillion, nine hundred five billion, seven hundred seventy-seven million, three hundred forty-two thousand, nine hundred eighty-five".