1681258108266 has 48 divisors (see below), whose sum is σ = 3974041644768. Its totient is φ = 509451789600.

The previous prime is 1681258108259. The next prime is 1681258108279. The reversal of 1681258108266 is 6628018521861.

It is a super-2 number, since 2×1681258108266² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5228901 + ... + 5541111.

It is an arithmetic number, because the mean of its divisors is an integer number (82792534266).

Almost surely, 2^{1681258108266} is an apocalyptic number.

1681258108266 is an abundant number, since it is smaller than the sum of its proper divisors (2292783536502).

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

1681258108266 is a wasteful number, since it uses less digits than its factorization.

1681258108266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339427 (or 339424 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 54.

The spelling of 1681258108266 in words is "one trillion, six hundred eighty-one billion, two hundred fifty-eight million, one hundred eight thousand, two hundred sixty-six".