155243698387 has 2 divisors, whose sum is σ = 155243698388. Its totient is φ = 155243698386.

The previous prime is 155243698361. The next prime is 155243698397. The reversal of 155243698387 is 783896342551.

It is a happy number.

155243698387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155243698387 is a prime.

It is not a weakly prime, because it can be changed into another prime (155243698307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77621849193 + 77621849194.

It is an arithmetic number, because the mean of its divisors is an integer number (77621849194).

Almost surely, 2^155243698387 is an apocalyptic number.

155243698387 is a deficient number, since it is larger than the sum of its proper divisors (1).

155243698387 is an equidigital number, since it uses as much as digits as its factorization.

155243698387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43545600, while the sum is 61.

The spelling of 155243698387 in words is "one hundred fifty-five billion, two hundred forty-three million, six hundred ninety-eight thousand, three hundred eighty-seven".