1678291118009 has 24 divisors (see below), whose sum is σ = 1847429537184. Its totient is φ = 1523491006400.

The previous prime is 1678291117903. The next prime is 1678291118027. The reversal of 1678291118009 is 9008111928761.

It is a happy number.

It is not a de Polignac number, because 1678291118009 - 2⁸ = 1678291117753 is a prime.

It is a super-2 number, since 2×1678291118009² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1678291115009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 350591114 + ... + 350595900.

It is an arithmetic number, because the mean of its divisors is an integer number (76976230716).

Almost surely, 2^{1678291118009} is an apocalyptic number.

It is an amenable number.

1678291118009 is a deficient number, since it is larger than the sum of its proper divisors (169138419175).

1678291118009 is a wasteful number, since it uses less digits than its factorization.

1678291118009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8437 (or 8426 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 53.

The spelling of 1678291118009 in words is "one trillion, six hundred seventy-eight billion, two hundred ninety-one million, one hundred eighteen thousand, nine".