155775361 has 9 divisors (see below), whose sum is σ = 181309761. Its totient is φ = 133446852.

The previous prime is 155775337. The next prime is 155775379. The reversal of 155775361 is 163577551.

The square root of 155775361 is 12481.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 155775361 - 2⁵ = 155775329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155775311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 86476 + ... + 88258.

It is an arithmetic number, because the mean of its divisors is an integer number (20145529).

Almost surely, 2^155775361 is an apocalyptic number.

155775361 is the 12481-st square number.

155775361 is the 6241-st centered octagonal number.

It is an amenable number.

155775361 is a deficient number, since it is larger than the sum of its proper divisors (25534400).

155775361 is an frugal number, since it uses more digits than its factorization.

155775361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580 (or 1790 counting only the distinct ones).

The product of its digits is 110250, while the sum is 40.

The cubic root of 155775361 is about 538.0627440262.

The spelling of 155775361 in words is "one hundred fifty-five million, seven hundred seventy-five thousand, three hundred sixty-one".