3981851799552 has 1040 divisors, whose sum is σ = 13372291620864. Its totient is φ = 1180259942400.

The previous prime is 3981851799547. The next prime is 3981851799587. The reversal of 3981851799552 is 2559971581893.

3981851799552 is a `hidden beast` number, since 3 + 9 + 8 + 18 + 51 + 7 + 9 + 9 + 552 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 31353163713 + ... + 31353163839.

Almost surely, 2^{3981851799552} is an apocalyptic number.

3981851799552 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 3981851799552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6686145810432).

3981851799552 is an abundant number, since it is smaller than the sum of its proper divisors (9390439821312).

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

3981851799552 is an equidigital number, since it uses as much as digits as its factorization.

3981851799552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 214 counting only the distinct ones).

The product of its digits is 244944000, while the sum is 72.

The spelling of 3981851799552 in words is "three trillion, nine hundred eighty-one billion, eight hundred fifty-one million, seven hundred ninety-nine thousand, five hundred fifty-two".