3971354266543 has 4 divisors (see below), whose sum is σ = 3971368759960. Its totient is φ = 3971339773128.

The previous prime is 3971354266541. The next prime is 3971354266547. The reversal of 3971354266543 is 3456624531793.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3971354266543 - 2¹ = 3971354266541 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 (3971354266541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6827613 + ... + 7386406.

It is an arithmetic number, because the mean of its divisors is an integer number (992842189990).

Almost surely, 2^{3971354266543} is an apocalyptic number.

3971354266543 is a deficient number, since it is larger than the sum of its proper divisors (14493417).

3971354266543 is a wasteful number, since it uses less digits than its factorization.

3971354266543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14493416.

The product of its digits is 48988800, while the sum is 58.

The spelling of 3971354266543 in words is "three trillion, nine hundred seventy-one billion, three hundred fifty-four million, two hundred sixty-six thousand, five hundred forty-three".