155451116805493 has 2 divisors, whose sum is σ = 155451116805494. Its totient is φ = 155451116805492.

The previous prime is 155451116805461. The next prime is 155451116805511. The reversal of 155451116805493 is 394508611154551.

It is a happy number.

155451116805493 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 can be written as a sum of positive squares in only one way, i.e., 93958261944849 + 61492854860644 = 9693207^2 + 7841738^2 .

It is an emirp because it is prime and its reverse (394508611154551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155451116805493 - 2⁵ = 155451116805461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155451116805293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77725558402746 + 77725558402747.

It is an arithmetic number, because the mean of its divisors is an integer number (77725558402747).

Almost surely, 2^{155451116805493} is an apocalyptic number.

It is an amenable number.

155451116805493 is a deficient number, since it is larger than the sum of its proper divisors (1).

155451116805493 is an equidigital number, since it uses as much as digits as its factorization.

155451116805493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960000, while the sum is 58.

The spelling of 155451116805493 in words is "one hundred fifty-five trillion, four hundred fifty-one billion, one hundred sixteen million, eight hundred five thousand, four hundred ninety-three".