168746553505231 has 6 divisors (see below), whose sum is σ = 182725557937800. Its totient is φ = 155766049389288.

The previous prime is 168746553505223. The next prime is 168746553505261. The reversal of 168746553505231 is 132505355647861.

It is not a de Polignac number, because 168746553505231 - 2³ = 168746553505223 is a prime.

It is a super-2 number, since 2×168746553505231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168746553505231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168746553505261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 499250158131 + ... + 499250158468.

It is an arithmetic number, because the mean of its divisors is an integer number (30454259656300).

Almost surely, 2^{168746553505231} is an apocalyptic number.

168746553505231 is a deficient number, since it is larger than the sum of its proper divisors (13979004432569).

168746553505231 is an equidigital number, since it uses as much as digits as its factorization.

168746553505231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998500316625 (or 998500316612 counting only the distinct ones).

The product of its (nonzero) digits is 90720000, while the sum is 61.

The spelling of 168746553505231 in words is "one hundred sixty-eight trillion, seven hundred forty-six billion, five hundred fifty-three million, five hundred five thousand, two hundred thirty-one".