156162109 has 2 divisors, whose sum is σ = 156162110. Its totient is φ = 156162108.

The previous prime is 156162101. The next prime is 156162131. The reversal of 156162109 is 901261651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151659225 + 4502884 = 12315^2 + 2122^2 .

It is a cyclic number.

It is not a de Polignac number, because 156162109 - 2³ = 156162101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156162101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78081054 + 78081055.

It is an arithmetic number, because the mean of its divisors is an integer number (78081055).

Almost surely, 2^156162109 is an apocalyptic number.

It is an amenable number.

156162109 is a deficient number, since it is larger than the sum of its proper divisors (1).

156162109 is an equidigital number, since it uses as much as digits as its factorization.

156162109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 156162109 is about 12496.4838654719. The cubic root of 156162109 is about 538.5076640094.

The spelling of 156162109 in words is "one hundred fifty-six million, one hundred sixty-two thousand, one hundred nine".