3971334169536 has 112 divisors (see below), whose sum is σ = 10857908444160. Its totient is φ = 1279720949760.

The previous prime is 3971334169531. The next prime is 3971334169573. The reversal of 3971334169536 is 6359614331793.

It is a happy number.

It is a super-2 number, since 2×3971334169536² (a number of 26 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 3971334169536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3971334169531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5284260 + ... + 5988828.

Almost surely, 2^{3971334169536} 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 3971334169536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5428954222080).

3971334169536 is an abundant number, since it is smaller than the sum of its proper divisors (6886574274624).

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

3971334169536 is a wasteful number, since it uses less digits than its factorization.

3971334169536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705562 (or 705552 counting only the distinct ones).

The product of its digits is 33067440, while the sum is 60.

The spelling of 3971334169536 in words is "three trillion, nine hundred seventy-one billion, three hundred thirty-four million, one hundred sixty-nine thousand, five hundred thirty-six".