2001967447771 has 2 divisors, whose sum is σ = 2001967447772. Its totient is φ = 2001967447770.

The previous prime is 2001967447757. The next prime is 2001967447783. The reversal of 2001967447771 is 1777447691002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2001967447771 - 2¹³ = 2001967439579 is a prime.

It is a super-2 number, since 2×2001967447771² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2001967447721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000983723885 + 1000983723886.

It is an arithmetic number, because the mean of its divisors is an integer number (1000983723886).

Almost surely, 2^{2001967447771} is an apocalyptic number.

2001967447771 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001967447771 is an equidigital number, since it uses as much as digits as its factorization.

2001967447771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4148928, while the sum is 55.

The spelling of 2001967447771 in words is "two trillion, one billion, nine hundred sixty-seven million, four hundred forty-seven thousand, seven hundred seventy-one".