1640017913777 has 2 divisors, whose sum is σ = 1640017913778. Its totient is φ = 1640017913776.

The previous prime is 1640017913771. The next prime is 1640017913791. The reversal of 1640017913777 is 7773197100461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1633281444001 + 6736469776 = 1277999^2 + 82076^2 .

It is a cyclic number.

It is not a de Polignac number, because 1640017913777 - 2¹⁶ = 1640017848241 is a prime.

It is not a weakly prime, because it can be changed into another prime (1640017913771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820008956888 + 820008956889.

It is an arithmetic number, because the mean of its divisors is an integer number (820008956889).

Almost surely, 2^{1640017913777} is an apocalyptic number.

It is an amenable number.

1640017913777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640017913777 is an equidigital number, since it uses as much as digits as its factorization.

1640017913777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1555848, while the sum is 53.

The spelling of 1640017913777 in words is "one trillion, six hundred forty billion, seventeen million, nine hundred thirteen thousand, seven hundred seventy-seven".