1518643945 has 32 divisors (see below), whose sum is σ = 2269999872. Its totient is φ = 949646592.

The previous prime is 1518643937. The next prime is 1518643963. The reversal of 1518643945 is 5493468151.

It is a cyclic number.

It is not a de Polignac number, because 1518643945 - 2³ = 1518643937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1518643895 and 1518643904.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17659 + ... + 57871.

It is an arithmetic number, because the mean of its divisors is an integer number (70937496).

Almost surely, 2^1518643945 is an apocalyptic number.

It is an amenable number.

1518643945 is a deficient number, since it is larger than the sum of its proper divisors (751355927).

1518643945 is a wasteful number, since it uses less digits than its factorization.

1518643945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40321.

The product of its digits is 518400, while the sum is 46.

The square root of 1518643945 is about 38969.7824602602. The cubic root of 1518643945 is about 1149.4373921002.

The spelling of 1518643945 in words is "one billion, five hundred eighteen million, six hundred forty-three thousand, nine hundred forty-five".