155393866 has 12 divisors (see below), whose sum is σ = 236435346. Its totient is φ = 76597640.

The previous prime is 155393851. The next prime is 155393867. The reversal of 155393866 is 668393551.

It can be written as a sum of positive squares in only one way, i.e., 105987025 + 49406841 = 10295^2 + 7029^2 .

It is not an unprimeable number, because it can be changed into a prime (155393867) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 2376 + ... + 17788.

Almost surely, 2^155393866 is an apocalyptic number.

155393866 is a deficient number, since it is larger than the sum of its proper divisors (81041480).

155393866 is an equidigital number, since it uses as much as digits as its factorization.

155393866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15557 (or 15486 counting only the distinct ones).

The product of its digits is 583200, while the sum is 46.

The square root of 155393866 is about 12465.7076012555. The cubic root of 155393866 is about 537.6231451033.

The spelling of 155393866 in words is "one hundred fifty-five million, three hundred ninety-three thousand, eight hundred sixty-six".