1616001818 has 8 divisors (see below), whose sum is σ = 2448003060. Its totient is φ = 800000800.

The previous prime is 1616001817. The next prime is 1616001841. The reversal of 1616001818 is 8181006161.

It can be written as a sum of positive squares in 2 ways, for example, as 1462068169 + 153933649 = 38237^2 + 12407^2 .

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

It is a super-2 number, since 2×1616001818² = 5222923751558610248, which contains 22 as substring.

1616001818 is a modest number, since divided by 1818 gives 1616 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1616001811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3999803 + ... + 4000206.

Almost surely, 2^1616001818 is an apocalyptic number.

1616001818 is a deficient number, since it is larger than the sum of its proper divisors (832001242).

1616001818 is a wasteful number, since it uses less digits than its factorization.

1616001818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8000112.

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 1616001818 is about 40199.5250966973. The cubic root of 1616001818 is about 1173.4933017482.

Adding to 1616001818 its reverse (8181006161), we get a palindrome (9797007979).

The spelling of 1616001818 in words is "one billion, six hundred sixteen million, one thousand, eight hundred eighteen".