156457233209 has 2 divisors, whose sum is σ = 156457233210. Its totient is φ = 156457233208.

The previous prime is 156457233197. The next prime is 156457233277. The reversal of 156457233209 is 902332754651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133064448400 + 23392784809 = 364780^2 + 152947^2 .

It is a cyclic number.

It is not a de Polignac number, because 156457233209 - 2⁴ = 156457233193 is a prime.

It is not a weakly prime, because it can be changed into another prime (156457233299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78228616604 + 78228616605.

It is an arithmetic number, because the mean of its divisors is an integer number (78228616605).

Almost surely, 2^156457233209 is an apocalyptic number.

It is an amenable number.

156457233209 is a deficient number, since it is larger than the sum of its proper divisors (1).

156457233209 is an equidigital number, since it uses as much as digits as its factorization.

156457233209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1360800, while the sum is 47.

The spelling of 156457233209 in words is "one hundred fifty-six billion, four hundred fifty-seven million, two hundred thirty-three thousand, two hundred nine".