168925781231 has 8 divisors (see below), whose sum is σ = 174756486720. Its totient is φ = 163095454368.

The previous prime is 168925781183. The next prime is 168925781279. The reversal of 168925781231 is 132187529861.

It is an interprime number because it is at equal distance from previous prime (168925781183) and next prime (168925781279).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168925781231 is a prime.

It is a super-2 number, since 2×168925781231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168925789231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1046330 + ... + 1196936.

It is an arithmetic number, because the mean of its divisors is an integer number (21844560840).

Almost surely, 2^168925781231 is an apocalyptic number.

168925781231 is a deficient number, since it is larger than the sum of its proper divisors (5830705489).

168925781231 is a wasteful number, since it uses less digits than its factorization.

168925781231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189313.

The product of its digits is 1451520, while the sum is 53.

The spelling of 168925781231 in words is "one hundred sixty-eight billion, nine hundred twenty-five million, seven hundred eighty-one thousand, two hundred thirty-one".