155605563 has 16 divisors (see below), whose sum is σ = 230755840. Its totient is φ = 103633992.

The previous prime is 155605543. The next prime is 155605591. The reversal of 155605563 is 365506551.

155605563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155605563 - 2⁵ = 155605531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155605543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32970 + ... + 37392.

It is an arithmetic number, because the mean of its divisors is an integer number (14422240).

Almost surely, 2^155605563 is an apocalyptic number.

155605563 is a deficient number, since it is larger than the sum of its proper divisors (75150277).

155605563 is a wasteful number, since it uses less digits than its factorization.

155605563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5735 (or 5729 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 36.

The square root of 155605563 is about 12474.1958859078. The cubic root of 155605563 is about 537.8671735313.

The spelling of 155605563 in words is "one hundred fifty-five million, six hundred five thousand, five hundred sixty-three".