155105520005005 has 32 divisors (see below), whose sum is σ = 193257597150720. Its totient is φ = 119419639019520.

The previous prime is 155105520004913. The next prime is 155105520005039. The reversal of 155105520005005 is 500500025501551.

It is not a de Polignac number, because 155105520005005 - 2²¹ = 155105517907853 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49202877 + ... + 52260253.

It is an arithmetic number, because the mean of its divisors is an integer number (6039299910960).

Almost surely, 2^{155105520005005} is an apocalyptic number.

It is an amenable number.

155105520005005 is a deficient number, since it is larger than the sum of its proper divisors (38152077145715).

155105520005005 is a wasteful number, since it uses less digits than its factorization.

155105520005005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3061029.

The product of its (nonzero) digits is 31250, while the sum is 34.

Adding to 155105520005005 its reverse (500500025501551), we get a palindrome (655605545506556).

The spelling of 155105520005005 in words is "one hundred fifty-five trillion, one hundred five billion, five hundred twenty million, five thousand, five".