155033201220389 has 2 divisors, whose sum is σ = 155033201220390. Its totient is φ = 155033201220388.

The previous prime is 155033201220349. The next prime is 155033201220421. The reversal of 155033201220389 is 983022102330551.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122456024020225 + 32577177200164 = 11065985^2 + 5707642^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155033201220389 is a prime.

It is a super-2 number, since 2×155033201220389² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155033201220319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77516600610194 + 77516600610195.

It is an arithmetic number, because the mean of its divisors is an integer number (77516600610195).

Almost surely, 2^{155033201220389} is an apocalyptic number.

It is an amenable number.

155033201220389 is a deficient number, since it is larger than the sum of its proper divisors (1).

155033201220389 is an equidigital number, since it uses as much as digits as its factorization.

155033201220389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 155033201220389 in words is "one hundred fifty-five trillion, thirty-three billion, two hundred one million, two hundred twenty thousand, three hundred eighty-nine".