168870551389 has 2 divisors, whose sum is σ = 168870551390. Its totient is φ = 168870551388.

The previous prime is 168870551351. The next prime is 168870551393. The reversal of 168870551389 is 983155078861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131665928164 + 37204623225 = 362858^2 + 192885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168870551389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168870551789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84435275694 + 84435275695.

It is an arithmetic number, because the mean of its divisors is an integer number (84435275695).

Almost surely, 2^168870551389 is an apocalyptic number.

It is an amenable number.

168870551389 is a deficient number, since it is larger than the sum of its proper divisors (1).

168870551389 is an equidigital number, since it uses as much as digits as its factorization.

168870551389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14515200, while the sum is 61.

The spelling of 168870551389 in words is "one hundred sixty-eight billion, eight hundred seventy million, five hundred fifty-one thousand, three hundred eighty-nine".