68161507 has 2 divisors, whose sum is σ = 68161508. Its totient is φ = 68161506.

The previous prime is 68161501. The next prime is 68161543. The reversal of 68161507 is 70516186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68161507 - 2²³ = 59772899 is a prime.

It is a super-2 number, since 2×68161507² = 9291982073022098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68161501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34080753 + 34080754.

It is an arithmetic number, because the mean of its divisors is an integer number (34080754).

Almost surely, 2^68161507 is an apocalyptic number.

68161507 is a deficient number, since it is larger than the sum of its proper divisors (1).

68161507 is an equidigital number, since it uses as much as digits as its factorization.

68161507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 68161507 is about 8255.9982437014. The cubic root of 68161507 is about 408.4883997291.

The spelling of 68161507 in words is "sixty-eight million, one hundred sixty-one thousand, five hundred seven".