1918280918268 has 216 divisors, whose sum is σ = 5742772996688. Its totient is φ = 536310720000.

The previous prime is 1918280918237. The next prime is 1918280918269. The reversal of 1918280918268 is 8628190828191.

1918280918268 is a `hidden beast` number, since 1 + 9 + 1 + 8 + 280 + 91 + 8 + 268 = 666.

It is a super-2 number, since 2×1918280918268² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918280918269) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 129161043 + ... + 129175893.

Almost surely, 2^{1918280918268} is an apocalyptic number.

1918280918268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1918280918268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2871386498344).

1918280918268 is an abundant number, since it is smaller than the sum of its proper divisors (3824492078420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1918280918268 is a wasteful number, since it uses less digits than its factorization.

1918280918268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17177 (or 17161 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 63.

The spelling of 1918280918268 in words is "one trillion, nine hundred eighteen billion, two hundred eighty million, nine hundred eighteen thousand, two hundred sixty-eight".