1639517145899 has 2 divisors, whose sum is σ = 1639517145900. Its totient is φ = 1639517145898.

The previous prime is 1639517145839. The next prime is 1639517145947. The reversal of 1639517145899 is 9985417159361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1639517145899 - 2¹² = 1639517141803 is a prime.

It is not a weakly prime, because it can be changed into another prime (1639517145839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 819758572949 + 819758572950.

It is an arithmetic number, because the mean of its divisors is an integer number (819758572950).

Almost surely, 2^{1639517145899} is an apocalyptic number.

1639517145899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1639517145899 is an equidigital number, since it uses as much as digits as its factorization.

1639517145899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73483200, while the sum is 68.

The spelling of 1639517145899 in words is "one trillion, six hundred thirty-nine billion, five hundred seventeen million, one hundred forty-five thousand, eight hundred ninety-nine".