1918486216 has 8 divisors (see below), whose sum is σ = 3597161670. Its totient is φ = 959243104.

The previous prime is 1918486169. The next prime is 1918486217. The reversal of 1918486216 is 6126848191.

It can be written as a sum of positive squares in only one way, i.e., 1358217316 + 560268900 = 36854^2 + 23670^2 .

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

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1918486217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119905381 + ... + 119905396.

Almost surely, 2^1918486216 is an apocalyptic number.

It is an amenable number.

1918486216 is a deficient number, since it is larger than the sum of its proper divisors (1678675454).

1918486216 is a wasteful number, since it uses less digits than its factorization.

1918486216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239810783 (or 239810779 counting only the distinct ones).

The product of its digits is 165888, while the sum is 46.

The square root of 1918486216 is about 43800.5275767313. The cubic root of 1918486216 is about 1242.5662721339.

The spelling of 1918486216 in words is "one billion, nine hundred eighteen million, four hundred eighty-six thousand, two hundred sixteen".