3811205447864 has 8 divisors (see below), whose sum is σ = 7146010214760. Its totient is φ = 1905602723928.

The previous prime is 3811205447843. The next prime is 3811205447873. The reversal of 3811205447864 is 4687445021183.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 238200340484 + ... + 238200340499.

It is an arithmetic number, because the mean of its divisors is an integer number (893251276845).

Almost surely, 2^{3811205447864} is an apocalyptic number.

It is an amenable number.

3811205447864 is a deficient number, since it is larger than the sum of its proper divisors (3334804766896).

3811205447864 is a wasteful number, since it uses less digits than its factorization.

3811205447864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476400680989 (or 476400680985 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 53.

The spelling of 3811205447864 in words is "three trillion, eight hundred eleven billion, two hundred five million, four hundred forty-seven thousand, eight hundred sixty-four".