155528091271 has 6 divisors (see below), whose sum is σ = 180920432760. Its totient is φ = 133309792476.

The previous prime is 155528091263. The next prime is 155528091319. The reversal of 155528091271 is 172190825551.

It is a happy number.

It is not a de Polignac number, because 155528091271 - 2³ = 155528091263 is a prime.

It is the 394371-st Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155528091371) by changing a digit.

It is a nontrivial repunit in base 394370.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1587021291 + ... + 1587021388.

It is an arithmetic number, because the mean of its divisors is an integer number (30153405460).

Almost surely, 2^155528091271 is an apocalyptic number.

155528091271 is a deficient number, since it is larger than the sum of its proper divisors (25392341489).

155528091271 is an equidigital number, since it uses as much as digits as its factorization.

155528091271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3174042693 (or 3174042686 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 46.

The spelling of 155528091271 in words is "one hundred fifty-five billion, five hundred twenty-eight million, ninety-one thousand, two hundred seventy-one".