1881608139684 has 432 divisors, whose sum is σ = 6166223271936. Its totient is φ = 479023372800.

The previous prime is 1881608139643. The next prime is 1881608139709. The reversal of 1881608139684 is 4869318061881.

1881608139684 is a `hidden beast` number, since 1 + 8 + 8 + 1 + 608 + 13 + 9 + 6 + 8 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 299282389 + ... + 299288675.

Almost surely, 2^{1881608139684} is an apocalyptic number.

1881608139684 is a gapful number since it is divisible by the number (14) 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 1881608139684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3083111635968).

1881608139684 is an abundant number, since it is smaller than the sum of its proper divisors (4284615132252).

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

1881608139684 is a wasteful number, since it uses less digits than its factorization.

1881608139684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6776 (or 6764 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 63.

The spelling of 1881608139684 in words is "one trillion, eight hundred eighty-one billion, six hundred eight million, one hundred thirty-nine thousand, six hundred eighty-four".