3981849281436 has 96 divisors (see below), whose sum is σ = 10029887239680. Its totient is φ = 1222221567744.

The previous prime is 3981849281383. The next prime is 3981849281471. The reversal of 3981849281436 is 6341829481893.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 195879505 + ... + 195899831.

It is an arithmetic number, because the mean of its divisors is an integer number (104477992080).

Almost surely, 2^{3981849281436} is an apocalyptic number.

It is an amenable number.

3981849281436 is an abundant number, since it is smaller than the sum of its proper divisors (6048037958244).

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

3981849281436 is a wasteful number, since it uses less digits than its factorization.

3981849281436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23323 (or 23321 counting only the distinct ones).

The product of its digits is 71663616, while the sum is 66.

The spelling of 3981849281436 in words is "three trillion, nine hundred eighty-one billion, eight hundred forty-nine million, two hundred eighty-one thousand, four hundred thirty-six".