181680368678 has 16 divisors (see below), whose sum is σ = 273929667264. Its totient is φ = 90370566720.

The previous prime is 181680368663. The next prime is 181680368693. The reversal of 181680368678 is 876863086181.

It is an interprime number because it is at equal distance from previous prime (181680368663) and next prime (181680368693).

It is a self number, because there is not a number n which added to its sum of digits gives 181680368678.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7344026 + ... + 7368722.

It is an arithmetic number, because the mean of its divisors is an integer number (17120604204).

Almost surely, 2^181680368678 is an apocalyptic number.

181680368678 is a deficient number, since it is larger than the sum of its proper divisors (92249298586).

181680368678 is a wasteful number, since it uses less digits than its factorization.

181680368678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43567.

The product of its (nonzero) digits is 18579456, while the sum is 62.

The spelling of 181680368678 in words is "one hundred eighty-one billion, six hundred eighty million, three hundred sixty-eight thousand, six hundred seventy-eight".