168551513293 has 2 divisors, whose sum is σ = 168551513294. Its totient is φ = 168551513292.

The previous prime is 168551513257. The next prime is 168551513297. The reversal of 168551513293 is 392315155861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134540039209 + 34011474084 = 366797^2 + 184422^2 .

It is a cyclic number.

It is not a de Polignac number, because 168551513293 - 2²⁹ = 168014642381 is a prime.

It is a super-2 number, since 2×168551513293² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168551513297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84275756646 + 84275756647.

It is an arithmetic number, because the mean of its divisors is an integer number (84275756647).

Almost surely, 2^168551513293 is an apocalyptic number.

It is an amenable number.

168551513293 is a deficient number, since it is larger than the sum of its proper divisors (1).

168551513293 is an equidigital number, since it uses as much as digits as its factorization.

168551513293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972000, while the sum is 49.

The spelling of 168551513293 in words is "one hundred sixty-eight billion, five hundred fifty-one million, five hundred thirteen thousand, two hundred ninety-three".