155440451533 has 2 divisors, whose sum is σ = 155440451534. Its totient is φ = 155440451532.

The previous prime is 155440451531. The next prime is 155440451557. The reversal of 155440451533 is 335154044551.

155440451533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136218570084 + 19221881449 = 369078^2 + 138643^2 .

It is a cyclic number.

It is not a de Polignac number, because 155440451533 - 2¹ = 155440451531 is a prime.

Together with 155440451531, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155440451531) 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, 77720225766 + 77720225767.

It is an arithmetic number, because the mean of its divisors is an integer number (77720225767).

Almost surely, 2^155440451533 is an apocalyptic number.

It is an amenable number.

155440451533 is a deficient number, since it is larger than the sum of its proper divisors (1).

155440451533 is an equidigital number, since it uses as much as digits as its factorization.

155440451533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360000, while the sum is 40.

The spelling of 155440451533 in words is "one hundred fifty-five billion, four hundred forty million, four hundred fifty-one thousand, five hundred thirty-three".