4021531671472 has 120 divisors (see below), whose sum is σ = 9384501829632. Its totient is φ = 1662874012800.

The previous prime is 4021531671463. The next prime is 4021531671601. The reversal of 4021531671472 is 2741761351204.

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, 7794673 + ... + 8294575.

Almost surely, 2^{4021531671472} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4021531671472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4692250914816).

4021531671472 is an abundant number, since it is smaller than the sum of its proper divisors (5362970158160).

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

4021531671472 is a wasteful number, since it uses less digits than its factorization.

4021531671472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500287 (or 500274 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 4021531671472 in words is "four trillion, twenty-one billion, five hundred thirty-one million, six hundred seventy-one thousand, four hundred seventy-two".