156634843213 has 2 divisors, whose sum is σ = 156634843214. Its totient is φ = 156634843212.

The previous prime is 156634843193. The next prime is 156634843237. The reversal of 156634843213 is 312348436651.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149488169769 + 7146673444 = 386637^2 + 84538^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156634843213 is a prime.

It is a super-2 number, since 2×156634843213² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156634843243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78317421606 + 78317421607.

It is an arithmetic number, because the mean of its divisors is an integer number (78317421607).

Almost surely, 2^156634843213 is an apocalyptic number.

It is an amenable number.

156634843213 is a deficient number, since it is larger than the sum of its proper divisors (1).

156634843213 is an equidigital number, since it uses as much as digits as its factorization.

156634843213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 46.

The spelling of 156634843213 in words is "one hundred fifty-six billion, six hundred thirty-four million, eight hundred forty-three thousand, two hundred thirteen".