1639241079571 has 2 divisors, whose sum is σ = 1639241079572. Its totient is φ = 1639241079570.

The previous prime is 1639241079547. The next prime is 1639241079589. The reversal of 1639241079571 is 1759701429361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1639241079571 - 2¹³ = 1639241071379 is a prime.

It is a super-2 number, since 2×1639241079571² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1639241079521) 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 as a sum of consecutive naturals, namely, 819620539785 + 819620539786.

It is an arithmetic number, because the mean of its divisors is an integer number (819620539786).

Almost surely, 2^{1639241079571} is an apocalyptic number.

1639241079571 is a deficient number, since it is larger than the sum of its proper divisors (1).

1639241079571 is an equidigital number, since it uses as much as digits as its factorization.

1639241079571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2857680, while the sum is 55.

The spelling of 1639241079571 in words is "one trillion, six hundred thirty-nine billion, two hundred forty-one million, seventy-nine thousand, five hundred seventy-one".