156505383137 has 2 divisors, whose sum is σ = 156505383138. Its totient is φ = 156505383136.

The previous prime is 156505383031. The next prime is 156505383163. The reversal of 156505383137 is 731383505651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112713961441 + 43791421696 = 335729^2 + 209264^2 .

It is a cyclic number.

It is not a de Polignac number, because 156505383137 - 2²⁰ = 156504334561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 156505383091 and 156505383100.

It is not a weakly prime, because it can be changed into another prime (156505383197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78252691568 + 78252691569.

It is an arithmetic number, because the mean of its divisors is an integer number (78252691569).

Almost surely, 2^156505383137 is an apocalyptic number.

It is an amenable number.

156505383137 is a deficient number, since it is larger than the sum of its proper divisors (1).

156505383137 is an equidigital number, since it uses as much as digits as its factorization.

156505383137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134000, while the sum is 47.

Adding to 156505383137 its reverse (731383505651), we get a palindrome (887888888788).

The spelling of 156505383137 in words is "one hundred fifty-six billion, five hundred five million, three hundred eighty-three thousand, one hundred thirty-seven".