3945783521472 has 168 divisors, whose sum is σ = 11307160747584. Its totient is φ = 1213826006016.

The previous prime is 3945783521467. The next prime is 3945783521473. The reversal of 3945783521472 is 2741253875493.

It is not an unprimeable number, because it can be changed into a prime (3945783521473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 196073203 + ... + 196093325.

Almost surely, 2^{3945783521472} is an apocalyptic number.

3945783521472 is a gapful number since it is divisible by the number (32) 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 3945783521472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5653580373792).

3945783521472 is an abundant number, since it is smaller than the sum of its proper divisors (7361377226112).

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

3945783521472 is a wasteful number, since it uses less digits than its factorization.

3945783521472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26207 (or 26184 counting only the distinct ones).

The product of its digits is 50803200, while the sum is 60.

The spelling of 3945783521472 in words is "three trillion, nine hundred forty-five billion, seven hundred eighty-three million, five hundred twenty-one thousand, four hundred seventy-two".