168941690551 has 8 divisors (see below), whose sum is σ = 182254521744. Its totient is φ = 156003868800.

The previous prime is 168941690521. The next prime is 168941690557. The reversal of 168941690551 is 155096149861.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 168941690551 - 2¹⁵ = 168941657783 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168941690492 and 168941690501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168941690557) 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, 93751425 + ... + 93753226.

It is an arithmetic number, because the mean of its divisors is an integer number (22781815218).

Almost surely, 2^168941690551 is an apocalyptic number.

168941690551 is a deficient number, since it is larger than the sum of its proper divisors (13312831193).

168941690551 is a wasteful number, since it uses less digits than its factorization.

168941690551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187504721.

The product of its (nonzero) digits is 2332800, while the sum is 55.

The spelling of 168941690551 in words is "one hundred sixty-eight billion, nine hundred forty-one million, six hundred ninety thousand, five hundred fifty-one".