1618145768 has 8 divisors (see below), whose sum is σ = 3034023330. Its totient is φ = 809072880.

The previous prime is 1618145717. The next prime is 1618145779. The reversal of 1618145768 is 8675418161.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1509944164 + 108201604 = 38858^2 + 10402^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101134103 + ... + 101134118.

Almost surely, 2^1618145768 is an apocalyptic number.

It is an amenable number.

1618145768 is a deficient number, since it is larger than the sum of its proper divisors (1415877562).

1618145768 is a wasteful number, since it uses less digits than its factorization.

1618145768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202268227 (or 202268223 counting only the distinct ones).

The product of its digits is 322560, while the sum is 47.

The square root of 1618145768 is about 40226.1826177926. The cubic root of 1618145768 is about 1174.0120303651.

The spelling of 1618145768 in words is "one billion, six hundred eighteen million, one hundred forty-five thousand, seven hundred sixty-eight".