4091186918864 has 10 divisors (see below), whose sum is σ = 7926674655330. Its totient is φ = 2045593459424.

The previous prime is 4091186918851. The next prime is 4091186918869. The reversal of 4091186918864 is 4688196811904.

It can be written as a sum of positive squares in only one way, i.e., 2188056307264 + 1903130611600 = 1479208^2 + 1379540^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 4091186918864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4091186918869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127849591199 + ... + 127849591230.

It is an arithmetic number, because the mean of its divisors is an integer number (792667465533).

Almost surely, 2^{4091186918864} is an apocalyptic number.

It is an amenable number.

4091186918864 is a deficient number, since it is larger than the sum of its proper divisors (3835487736466).

4091186918864 is a wasteful number, since it uses less digits than its factorization.

4091186918864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255699182437 (or 255699182431 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 65.

The spelling of 4091186918864 in words is "four trillion, ninety-one billion, one hundred eighty-six million, nine hundred eighteen thousand, eight hundred sixty-four".