1618617472 has 16 divisors (see below), whose sum is σ = 3224589750. Its totient is φ = 809308672.

The previous prime is 1618617449. The next prime is 1618617523. The reversal of 1618617472 is 2747168161.

It can be written as a sum of positive squares in only one way, i.e., 1525996096 + 92621376 = 39064^2 + 9624^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6322597 + ... + 6322852.

Almost surely, 2^1618617472 is an apocalyptic number.

It is an amenable number.

1618617472 is a deficient number, since it is larger than the sum of its proper divisors (1605972278).

1618617472 is an equidigital number, since it uses as much as digits as its factorization.

1618617472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12645463 (or 12645451 counting only the distinct ones).

The product of its digits is 112896, while the sum is 43.

The square root of 1618617472 is about 40232.0453370196. The cubic root of 1618617472 is about 1174.1260976263.

The spelling of 1618617472 in words is "one billion, six hundred eighteen million, six hundred seventeen thousand, four hundred seventy-two".