155521433132132 has 48 divisors (see below), whose sum is σ = 273732792197760. Its totient is φ = 77313053798400.

The previous prime is 155521433132111. The next prime is 155521433132209. The reversal of 155521433132132 is 231231334125551.

155521433132132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 155521433132132.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2517271082 + ... + 2517332862.

It is an arithmetic number, because the mean of its divisors is an integer number (5702766504120).

Almost surely, 2^{155521433132132} is an apocalyptic number.

It is an amenable number.

155521433132132 is a deficient number, since it is larger than the sum of its proper divisors (118211359065628).

155521433132132 is a wasteful number, since it uses less digits than its factorization.

155521433132132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65732 (or 65730 counting only the distinct ones).

The product of its digits is 324000, while the sum is 41.

Adding to 155521433132132 its reverse (231231334125551), we get a palindrome (386752767257683).

The spelling of 155521433132132 in words is "one hundred fifty-five trillion, five hundred twenty-one billion, four hundred thirty-three million, one hundred thirty-two thousand, one hundred thirty-two".