1871253648 has 120 divisors (see below), whose sum is σ = 6049139616. Its totient is φ = 533683200.

The previous prime is 1871253613. The next prime is 1871253667. The reversal of 1871253648 is 8463521781.

1871253648 is a `hidden beast` number, since 1 + 8 + 71 + 2 + 536 + 48 = 666.

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, 7818 + ... + 61673.

Almost surely, 2^1871253648 is an apocalyptic number.

1871253648 is a gapful number since it is divisible by the number (18) 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 1871253648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3024569808).

1871253648 is an abundant number, since it is smaller than the sum of its proper divisors (4177885968).

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

1871253648 is a wasteful number, since it uses less digits than its factorization.

1871253648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69533 (or 69524 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 1871253648 is about 43257.9894123617. The cubic root of 1871253648 is about 1232.2842185948.

The spelling of 1871253648 in words is "one billion, eight hundred seventy-one million, two hundred fifty-three thousand, six hundred forty-eight".