155849059549 has 2 divisors, whose sum is σ = 155849059550. Its totient is φ = 155849059548.

The previous prime is 155849059459. The next prime is 155849059571. The reversal of 155849059549 is 945950948551.

It is a happy number.

Together with previous prime (155849059459) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154572426649 + 1276632900 = 393157^2 + 35730^2 .

It is a cyclic number.

It is not a de Polignac number, because 155849059549 - 2²³ = 155840670941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155849659549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77924529774 + 77924529775.

It is an arithmetic number, because the mean of its divisors is an integer number (77924529775).

Almost surely, 2^155849059549 is an apocalyptic number.

It is an amenable number.

155849059549 is a deficient number, since it is larger than the sum of its proper divisors (1).

155849059549 is an equidigital number, since it uses as much as digits as its factorization.

155849059549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320000, while the sum is 64.

The spelling of 155849059549 in words is "one hundred fifty-five billion, eight hundred forty-nine million, fifty-nine thousand, five hundred forty-nine".