1886664489 has 16 divisors (see below), whose sum is σ = 2668174080. Its totient is φ = 1182476880.

The previous prime is 1886664473. The next prime is 1886664581. The reversal of 1886664489 is 9844666881.

It is not a de Polignac number, because 1886664489 - 2⁴ = 1886664473 is a prime.

It is a super-2 number, since 2×1886664489² = 7119005788107262242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1886664449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118867 + ... + 133800.

It is an arithmetic number, because the mean of its divisors is an integer number (166760880).

Almost surely, 2^1886664489 is an apocalyptic number.

1886664489 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1886664489 is a deficient number, since it is larger than the sum of its proper divisors (781509591).

1886664489 is a wasteful number, since it uses less digits than its factorization.

1886664489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252820.

The product of its digits is 15925248, while the sum is 60.

The square root of 1886664489 is about 43435.7512770298. The cubic root of 1886664489 is about 1235.6578287179.

The spelling of 1886664489 in words is "one billion, eight hundred eighty-six million, six hundred sixty-four thousand, four hundred eighty-nine".