156826326197 has 2 divisors, whose sum is σ = 156826326198. Its totient is φ = 156826326196.

The previous prime is 156826326191. The next prime is 156826326199. The reversal of 156826326197 is 791623628651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118177125361 + 38649200836 = 343769^2 + 196594^2 .

It is a cyclic number.

It is not a de Polignac number, because 156826326197 - 2¹⁴ = 156826309813 is a prime.

Together with 156826326199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156826326191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78413163098 + 78413163099.

It is an arithmetic number, because the mean of its divisors is an integer number (78413163099).

Almost surely, 2^156826326197 is an apocalyptic number.

It is an amenable number.

156826326197 is a deficient number, since it is larger than the sum of its proper divisors (1).

156826326197 is an equidigital number, since it uses as much as digits as its factorization.

156826326197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 56.

The spelling of 156826326197 in words is "one hundred fifty-six billion, eight hundred twenty-six million, three hundred twenty-six thousand, one hundred ninety-seven".