3941400778705 has 16 divisors (see below), whose sum is σ = 5095218355920. Its totient is φ = 2909592419328.

The previous prime is 3941400778657. The next prime is 3941400778723. The reversal of 3941400778705 is 5078770041493.

It can be written as a sum of positive squares in 8 ways, for example, as 1193073413841 + 2748327364864 = 1092279^2 + 1657808^2 .

It is a cyclic number.

It is not a de Polignac number, because 3941400778705 - 2²⁷ = 3941266560977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10018692 + ... + 10404661.

It is an arithmetic number, because the mean of its divisors is an integer number (318451147245).

Almost surely, 2^{3941400778705} is an apocalyptic number.

It is an amenable number.

3941400778705 is a deficient number, since it is larger than the sum of its proper divisors (1153817577215).

3941400778705 is a wasteful number, since it uses less digits than its factorization.

3941400778705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20426340.

The product of its (nonzero) digits is 5927040, while the sum is 55.

The spelling of 3941400778705 in words is "three trillion, nine hundred forty-one billion, four hundred million, seven hundred seventy-eight thousand, seven hundred five".