1640970792911 has 2 divisors, whose sum is σ = 1640970792912. Its totient is φ = 1640970792910.

The previous prime is 1640970792907. The next prime is 1640970792973. The reversal of 1640970792911 is 1192970790461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1640970792911 - 2² = 1640970792907 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1640970792211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820485396455 + 820485396456.

It is an arithmetic number, because the mean of its divisors is an integer number (820485396456).

Almost surely, 2^{1640970792911} is an apocalyptic number.

1640970792911 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640970792911 is an equidigital number, since it uses as much as digits as its factorization.

1640970792911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1714608, while the sum is 56.

The spelling of 1640970792911 in words is "one trillion, six hundred forty billion, nine hundred seventy million, seven hundred ninety-two thousand, nine hundred eleven".