115643511866 has 32 divisors (see below), whose sum is σ = 175951958400. Its totient is φ = 56998468800.

The previous prime is 115643511859. The next prime is 115643511869. The reversal of 115643511866 is 668115346511.

It is a self number, because there is not a number n which added to its sum of digits gives 115643511866.

It is not an unprimeable number, because it can be changed into a prime (115643511869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79261445 + ... + 79262903.

It is an arithmetic number, because the mean of its divisors is an integer number (5498498700).

Almost surely, 2^115643511866 is an apocalyptic number.

115643511866 is a deficient number, since it is larger than the sum of its proper divisors (60308446534).

115643511866 is a wasteful number, since it uses less digits than its factorization.

115643511866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3014.

The product of its digits is 518400, while the sum is 47.

The spelling of 115643511866 in words is "one hundred fifteen billion, six hundred forty-three million, five hundred eleven thousand, eight hundred sixty-six".