168056057987 has 2 divisors, whose sum is σ = 168056057988. Its totient is φ = 168056057986.

The previous prime is 168056057957. The next prime is 168056058061. The reversal of 168056057987 is 789750650861.

It is a weak prime.

It is an emirp because it is prime and its reverse (789750650861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168056057987 - 2¹⁴ = 168056041603 is a prime.

It is a super-2 number, since 2×168056057987² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (168056057927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84028028993 + 84028028994.

It is an arithmetic number, because the mean of its divisors is an integer number (84028028994).

Almost surely, 2^168056057987 is an apocalyptic number.

168056057987 is a deficient number, since it is larger than the sum of its proper divisors (1).

168056057987 is an equidigital number, since it uses as much as digits as its factorization.

168056057987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25401600, while the sum is 62.

The spelling of 168056057987 in words is "one hundred sixty-eight billion, fifty-six million, fifty-seven thousand, nine hundred eighty-seven".