161368512866 has 32 divisors (see below), whose sum is σ = 269477031168. Its totient is φ = 71848416640.

The previous prime is 161368512827. The next prime is 161368512937. The reversal of 161368512866 is 668215863161.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Curzon number.

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, 607271 + ... + 831573.

It is an arithmetic number, because the mean of its divisors is an integer number (8421157224).

Almost surely, 2^161368512866 is an apocalyptic number.

161368512866 is a deficient number, since it is larger than the sum of its proper divisors (108108518302).

161368512866 is a wasteful number, since it uses less digits than its factorization.

161368512866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224986.

The product of its digits is 2488320, while the sum is 53.

The spelling of 161368512866 in words is "one hundred sixty-one billion, three hundred sixty-eight million, five hundred twelve thousand, eight hundred sixty-six".