156034542217 has 2 divisors, whose sum is σ = 156034542218. Its totient is φ = 156034542216.

The previous prime is 156034542197. The next prime is 156034542229. The reversal of 156034542217 is 712245430651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89771545161 + 66262997056 = 299619^2 + 257416^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156034542217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 156034542217.

It is not a weakly prime, because it can be changed into another prime (156034542617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78017271108 + 78017271109.

It is an arithmetic number, because the mean of its divisors is an integer number (78017271109).

Almost surely, 2^156034542217 is an apocalyptic number.

It is an amenable number.

156034542217 is a deficient number, since it is larger than the sum of its proper divisors (1).

156034542217 is an equidigital number, since it uses as much as digits as its factorization.

156034542217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 40.

Adding to 156034542217 its reverse (712245430651), we get a palindrome (868279972868).

The spelling of 156034542217 in words is "one hundred fifty-six billion, thirty-four million, five hundred forty-two thousand, two hundred seventeen".