3981545071 has 8 divisors (see below), whose sum is σ = 4580877600. Its totient is φ = 3389847648.

The previous prime is 3981545059. The next prime is 3981545077. The reversal of 3981545071 is 1705451893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3981545071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3981545077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1907656 + ... + 1909741.

It is an arithmetic number, because the mean of its divisors is an integer number (572609700).

Almost surely, 2^3981545071 is an apocalyptic number.

3981545071 is a deficient number, since it is larger than the sum of its proper divisors (599332529).

3981545071 is a wasteful number, since it uses less digits than its factorization.

3981545071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3817553.

The product of its (nonzero) digits is 151200, while the sum is 43.

The square root of 3981545071 is about 63099.4855050340. The cubic root of 3981545071 is about 1584.9560067002.

It can be divided in two parts, 398154 and 5071, that added together give a square (403225 = 635²).

The spelling of 3981545071 in words is "three billion, nine hundred eighty-one million, five hundred forty-five thousand, seventy-one".