155209382478133 has 2 divisors, whose sum is σ = 155209382478134. Its totient is φ = 155209382478132.

The previous prime is 155209382478131. The next prime is 155209382478167. The reversal of 155209382478133 is 331874283902551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128553464012164 + 26655918465969 = 11338142^2 + 5162937^2 .

It is a cyclic number.

It is not a de Polignac number, because 155209382478133 - 2¹ = 155209382478131 is a prime.

Together with 155209382478131, 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 (155209382478131) 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, 77604691239066 + 77604691239067.

It is an arithmetic number, because the mean of its divisors is an integer number (77604691239067).

Almost surely, 2^{155209382478133} is an apocalyptic number.

It is an amenable number.

155209382478133 is a deficient number, since it is larger than the sum of its proper divisors (1).

155209382478133 is an equidigital number, since it uses as much as digits as its factorization.

155209382478133 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 155209382478133 in words is "one hundred fifty-five trillion, two hundred nine billion, three hundred eighty-two million, four hundred seventy-eight thousand, one hundred thirty-three".