156616091 has 2 divisors, whose sum is σ = 156616092. Its totient is φ = 156616090.

The previous prime is 156616067. The next prime is 156616111. The reversal of 156616091 is 190616651.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 156616091 - 2⁶ = 156616027 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (156612091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78308045 + 78308046.

It is an arithmetic number, because the mean of its divisors is an integer number (78308046).

Almost surely, 2^156616091 is an apocalyptic number.

156616091 is a deficient number, since it is larger than the sum of its proper divisors (1).

156616091 is an equidigital number, since it uses as much as digits as its factorization.

156616091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 156616091 is about 12514.6350725860. The cubic root of 156616091 is about 539.0289946230.

The spelling of 156616091 in words is "one hundred fifty-six million, six hundred sixteen thousand, ninety-one".