1619678964499 has 2 divisors, whose sum is σ = 1619678964500. Its totient is φ = 1619678964498.

The previous prime is 1619678964473. The next prime is 1619678964511. The reversal of 1619678964499 is 9944698769161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1619678964499 - 2¹³ = 1619678956307 is a prime.

It is not a weakly prime, because it can be changed into another prime (1619678968499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 809839482249 + 809839482250.

It is an arithmetic number, because the mean of its divisors is an integer number (809839482250).

Almost surely, 2^{1619678964499} is an apocalyptic number.

1619678964499 is a deficient number, since it is larger than the sum of its proper divisors (1).

1619678964499 is an equidigital number, since it uses as much as digits as its factorization.

1619678964499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1269789696, while the sum is 79.

The spelling of 1619678964499 in words is "one trillion, six hundred nineteen billion, six hundred seventy-eight million, nine hundred sixty-four thousand, four hundred ninety-nine".