1818915145 has 8 divisors (see below), whose sum is σ = 2184712704. Its totient is φ = 1453789104.

The previous prime is 1818915143. The next prime is 1818915151. The reversal of 1818915145 is 5415198181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1818915145 - 2¹ = 1818915143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1818915143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161899 + ... + 172768.

It is an arithmetic number, because the mean of its divisors is an integer number (273089088).

Almost surely, 2^1818915145 is an apocalyptic number.

It is an amenable number.

1818915145 is a deficient number, since it is larger than the sum of its proper divisors (365797559).

1818915145 is a wasteful number, since it uses less digits than its factorization.

1818915145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335759.

The product of its digits is 57600, while the sum is 43.

The square root of 1818915145 is about 42648.7414233996. The cubic root of 1818915145 is about 1220.6865134184.

The spelling of 1818915145 in words is "one billion, eight hundred eighteen million, nine hundred fifteen thousand, one hundred forty-five".