155454885 has 24 divisors (see below), whose sum is σ = 285306840. Its totient is φ = 78031872.

The previous prime is 155454869. The next prime is 155454947. The reversal of 155454885 is 588454551.

It can be written as a sum of positive squares in 4 ways, for example, as 64786401 + 90668484 = 8049^2 + 9522^2 .

It is not a de Polignac number, because 155454885 - 2⁴ = 155454869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 155454885.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 100840 + ... + 102369.

It is an arithmetic number, because the mean of its divisors is an integer number (11887785).

Almost surely, 2^155454885 is an apocalyptic number.

155454885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155454885 is a deficient number, since it is larger than the sum of its proper divisors (129851955).

155454885 is a wasteful number, since it uses less digits than its factorization.

155454885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203237 (or 203234 counting only the distinct ones).

The product of its digits is 640000, while the sum is 45.

The square root of 155454885 is about 12468.1548354197. The cubic root of 155454885 is about 537.6935059538.

The spelling of 155454885 in words is "one hundred fifty-five million, four hundred fifty-four thousand, eight hundred eighty-five".