155605005522 has 54 divisors (see below), whose sum is σ = 340664993487. Its totient is φ = 51332229792.

The previous prime is 155605005497. The next prime is 155605005533. The reversal of 155605005522 is 225500506551.

155605005522 is a `hidden beast` number, since 1 + 5 + 56 + 0 + 50 + 0 + 552 + 2 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 28855477161 + 126749528361 = 169869^2 + 356019^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=278931.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 182420448 + ... + 182421300.

Almost surely, 2^155605005522 is an apocalyptic number.

155605005522 is an abundant number, since it is smaller than the sum of its proper divisors (185059987965).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155605005522 is an frugal number, since it uses more digits than its factorization.

155605005522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932 (or 967 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The spelling of 155605005522 in words is "one hundred fifty-five billion, six hundred five million, five thousand, five hundred twenty-two".