2540166529991 has 2 divisors, whose sum is σ = 2540166529992. Its totient is φ = 2540166529990.

The previous prime is 2540166529987. The next prime is 2540166530009. The reversal of 2540166529991 is 1999256610452.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2540166529991 - 2² = 2540166529987 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2540166529991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2540166525991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270083264995 + 1270083264996.

It is an arithmetic number, because the mean of its divisors is an integer number (1270083264996).

Almost surely, 2^{2540166529991} is an apocalyptic number.

2540166529991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2540166529991 is an equidigital number, since it uses as much as digits as its factorization.

2540166529991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10497600, while the sum is 59.

The spelling of 2540166529991 in words is "two trillion, five hundred forty billion, one hundred sixty-six million, five hundred twenty-nine thousand, nine hundred ninety-one".