181968868870 has 32 divisors (see below), whose sum is σ = 346832539200. Its totient is φ = 68501723136.

The previous prime is 181968868859. The next prime is 181968868901. The reversal of 181968868870 is 78868869181.

It is a super-2 number, since 2×181968868870² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 181968868870.

It is a congruent 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, 5075166 + ... + 5110894.

It is an arithmetic number, because the mean of its divisors is an integer number (10838516850).

Almost surely, 2^181968868870 is an apocalyptic number.

181968868870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181968868870 is a deficient number, since it is larger than the sum of its proper divisors (164863670330).

181968868870 is a wasteful number, since it uses less digits than its factorization.

181968868870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65712.

The product of its (nonzero) digits is 74317824, while the sum is 70.

The spelling of 181968868870 in words is "one hundred eighty-one billion, nine hundred sixty-eight million, eight hundred sixty-eight thousand, eight hundred seventy".