1640970792973 has 2 divisors, whose sum is σ = 1640970792974. Its totient is φ = 1640970792972.

The previous prime is 1640970792911. The next prime is 1640970792983. The reversal of 1640970792973 is 3792970790461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1632458516329 + 8512276644 = 1277677^2 + 92262^2 .

It is an emirp because it is prime and its reverse (3792970790461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1640970792973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1640970792983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820485396486 + 820485396487.

It is an arithmetic number, because the mean of its divisors is an integer number (820485396487).

Almost surely, 2^{1640970792973} is an apocalyptic number.

It is an amenable number.

1640970792973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640970792973 is an equidigital number, since it uses as much as digits as its factorization.

1640970792973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36006768, while the sum is 64.

The spelling of 1640970792973 in words is "one trillion, six hundred forty billion, nine hundred seventy million, seven hundred ninety-two thousand, nine hundred seventy-three".