155665055 has 24 divisors (see below), whose sum is σ = 231177312. Its totient is φ = 98527104.

The previous prime is 155665051. The next prime is 155665057. The reversal of 155665055 is 550566551.

155665055 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 155665055 - 2² = 155665051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155665051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7244 + ... + 19073.

It is an arithmetic number, because the mean of its divisors is an integer number (9632388).

Almost surely, 2^155665055 is an apocalyptic number.

155665055 is a deficient number, since it is larger than the sum of its proper divisors (75512257).

155665055 is a wasteful number, since it uses less digits than its factorization.

155665055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26355 (or 26342 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 38.

The square root of 155665055 is about 12476.5802606323. The cubic root of 155665055 is about 537.9357116052.

The spelling of 155665055 in words is "one hundred fifty-five million, six hundred sixty-five thousand, fifty-five".