1641664264379 has 2 divisors, whose sum is σ = 1641664264380. Its totient is φ = 1641664264378.

The previous prime is 1641664264367. The next prime is 1641664264399. The reversal of 1641664264379 is 9734624661461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1641664264379 - 2²⁴ = 1641647487163 is a prime.

It is not a weakly prime, because it can be changed into another prime (1641664264399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820832132189 + 820832132190.

It is an arithmetic number, because the mean of its divisors is an integer number (820832132190).

Almost surely, 2^{1641664264379} is an apocalyptic number.

1641664264379 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641664264379 is an equidigital number, since it uses as much as digits as its factorization.

1641664264379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31352832, while the sum is 59.

The spelling of 1641664264379 in words is "one trillion, six hundred forty-one billion, six hundred sixty-four million, two hundred sixty-four thousand, three hundred seventy-nine".