168040726487 has 2 divisors, whose sum is σ = 168040726488. Its totient is φ = 168040726486.

The previous prime is 168040726409. The next prime is 168040726559. The reversal of 168040726487 is 784627040861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168040726487 - 2¹² = 168040722391 is a prime.

It is a super-2 number, since 2×168040726487² (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 (168040746487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84020363243 + 84020363244.

It is an arithmetic number, because the mean of its divisors is an integer number (84020363244).

Almost surely, 2^168040726487 is an apocalyptic number.

168040726487 is a deficient number, since it is larger than the sum of its proper divisors (1).

168040726487 is an equidigital number, since it uses as much as digits as its factorization.

168040726487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3612672, while the sum is 53.

The spelling of 168040726487 in words is "one hundred sixty-eight billion, forty million, seven hundred twenty-six thousand, four hundred eighty-seven".