156713985590549 has 2 divisors, whose sum is σ = 156713985590550. Its totient is φ = 156713985590548.

The previous prime is 156713985590527. The next prime is 156713985590593. The reversal of 156713985590549 is 945095589317651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98832428102500 + 57881557488049 = 9941450^2 + 7607993^2 .

It is a cyclic number.

It is not a de Polignac number, because 156713985590549 - 2³² = 156709690623253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 156713985590549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156713985590599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78356992795274 + 78356992795275.

It is an arithmetic number, because the mean of its divisors is an integer number (78356992795275).

Almost surely, 2^{156713985590549} is an apocalyptic number.

It is an amenable number.

156713985590549 is a deficient number, since it is larger than the sum of its proper divisors (1).

156713985590549 is an equidigital number, since it uses as much as digits as its factorization.

156713985590549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1837080000, while the sum is 77.

The spelling of 156713985590549 in words is "one hundred fifty-six trillion, seven hundred thirteen billion, nine hundred eighty-five million, five hundred ninety thousand, five hundred forty-nine".