1645179766291 has 2 divisors, whose sum is σ = 1645179766292. Its totient is φ = 1645179766290.

The previous prime is 1645179766247. The next prime is 1645179766297. The reversal of 1645179766291 is 1926679715461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1645179766291 - 2¹¹ = 1645179764243 is a prime.

It is not a weakly prime, because it can be changed into another prime (1645179766297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 822589883145 + 822589883146.

It is an arithmetic number, because the mean of its divisors is an integer number (822589883146).

Almost surely, 2^{1645179766291} is an apocalyptic number.

1645179766291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1645179766291 is an equidigital number, since it uses as much as digits as its factorization.

1645179766291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34292160, while the sum is 64.

The spelling of 1645179766291 in words is "one trillion, six hundred forty-five billion, one hundred seventy-nine million, seven hundred sixty-six thousand, two hundred ninety-one".