1871489672312 has 32 divisors (see below), whose sum is σ = 3779200220880. Its totient is φ = 863711735040.

The previous prime is 1871489672281. The next prime is 1871489672317. The reversal of 1871489672312 is 2132769841781.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1871489672317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1188887 + ... + 2270777.

Almost surely, 2^{1871489672312} is an apocalyptic number.

It is an amenable number.

1871489672312 is an abundant number, since it is smaller than the sum of its proper divisors (1907710548568).

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

1871489672312 is a wasteful number, since it uses less digits than its factorization.

1871489672312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098543 (or 1098539 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 59.

The spelling of 1871489672312 in words is "one trillion, eight hundred seventy-one billion, four hundred eighty-nine million, six hundred seventy-two thousand, three hundred twelve".