3965697856835 has 64 divisors (see below), whose sum is σ = 5620107265920. Its totient is φ = 2648362106880.

The previous prime is 3965697856831. The next prime is 3965697856847. The reversal of 3965697856835 is 5386587965693.

It is a Cunningham number, because it is equal to 1991406²-1.

It is not a de Polignac number, because 3965697856835 - 2² = 3965697856831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3965697856835.

It is not an unprimeable number, because it can be changed into a prime (3965697856831) 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 63 ways as a sum of consecutive naturals, for example, 129426137 + ... + 129456773.

It is an arithmetic number, because the mean of its divisors is an integer number (87814176030).

Almost surely, 2^{3965697856835} is an apocalyptic number.

3965697856835 is a deficient number, since it is larger than the sum of its proper divisors (1654409409085).

3965697856835 is a wasteful number, since it uses less digits than its factorization.

3965697856835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31608.

The product of its digits is 8817984000, while the sum is 80.

The spelling of 3965697856835 in words is "three trillion, nine hundred sixty-five billion, six hundred ninety-seven million, eight hundred fifty-six thousand, eight hundred thirty-five".