1871069805872 has 20 divisors (see below), whose sum is σ = 3742139612736. Its totient is φ = 905356357440.

The previous prime is 1871069805853. The next prime is 1871069805887. The reversal of 1871069805872 is 2785089601781.

1871069805872 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1886158583 + ... + 1886159574.

Almost surely, 2^{1871069805872} is an apocalyptic number.

It is an amenable number.

1871069805872 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1871069805872 is a wasteful number, since it uses less digits than its factorization.

1871069805872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3772318196 (or 3772318190 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 62.

The spelling of 1871069805872 in words is "one trillion, eight hundred seventy-one billion, sixty-nine million, eight hundred five thousand, eight hundred seventy-two".