1681878614016 has 136 divisors (see below), whose sum is σ = 4517314829440. Its totient is φ = 556583878656.

The previous prime is 1681878613991. The next prime is 1681878614021. The reversal of 1681878614016 is 6104168781861.

It is a super-2 number, since 2×1681878614016² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27297741 + ... + 27359283.

Almost surely, 2^{1681878614016} is an apocalyptic number.

1681878614016 is a gapful number since it is divisible by the number (16) 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 1681878614016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2258657414720).

1681878614016 is an abundant number, since it is smaller than the sum of its proper divisors (2835436215424).

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

1681878614016 is an frugal number, since it uses more digits than its factorization.

1681878614016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61717 (or 61687 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 57.

The spelling of 1681878614016 in words is "one trillion, six hundred eighty-one billion, eight hundred seventy-eight million, six hundred fourteen thousand, sixteen".