155661355 has 16 divisors (see below), whose sum is σ = 195649344. Its totient is φ = 118666240.

The previous prime is 155661349. The next prime is 155661377. The reversal of 155661355 is 553166551.

It is not a de Polignac number, because 155661355 - 2³ = 155661347 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29907 + ... + 34723.

It is an arithmetic number, because the mean of its divisors is an integer number (12228084).

Almost surely, 2^155661355 is an apocalyptic number.

155661355 is a deficient number, since it is larger than the sum of its proper divisors (39987989).

155661355 is a wasteful number, since it uses less digits than its factorization.

155661355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5126.

The product of its digits is 67500, while the sum is 37.

The square root of 155661355 is about 12476.4319819410. The cubic root of 155661355 is about 537.9314495099.

The spelling of 155661355 in words is "one hundred fifty-five million, six hundred sixty-one thousand, three hundred fifty-five".