156628601 has 2 divisors, whose sum is σ = 156628602. Its totient is φ = 156628600.

The previous prime is 156628579. The next prime is 156628603. The reversal of 156628601 is 106826651.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78765625 + 77862976 = 8875^2 + 8824^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156628601 is a prime.

Together with 156628603, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (156628603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78314300 + 78314301.

It is an arithmetic number, because the mean of its divisors is an integer number (78314301).

Almost surely, 2^156628601 is an apocalyptic number.

It is an amenable number.

156628601 is a deficient number, since it is larger than the sum of its proper divisors (1).

156628601 is an equidigital number, since it uses as much as digits as its factorization.

156628601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 156628601 is about 12515.1348774194. The cubic root of 156628601 is about 539.0433462202.

The spelling of 156628601 in words is "one hundred fifty-six million, six hundred twenty-eight thousand, six hundred one".