3971354266541 has 2 divisors, whose sum is σ = 3971354266542. Its totient is φ = 3971354266540.

The previous prime is 3971354266487. The next prime is 3971354266547. The reversal of 3971354266541 is 1456624531793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3941201680516 + 30152586025 = 1985246^2 + 173645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3971354266541 is a prime.

It is a super-3 number, since 3×3971354266541³ (a number of 39 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3971354266547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1985677133270 + 1985677133271.

It is an arithmetic number, because the mean of its divisors is an integer number (1985677133271).

Almost surely, 2^{3971354266541} is an apocalyptic number.

It is an amenable number.

3971354266541 is a deficient number, since it is larger than the sum of its proper divisors (1).

3971354266541 is an equidigital number, since it uses as much as digits as its factorization.

3971354266541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16329600, while the sum is 56.

The spelling of 3971354266541 in words is "three trillion, nine hundred seventy-one billion, three hundred fifty-four million, two hundred sixty-six thousand, five hundred forty-one".