1600640077 has 2 divisors, whose sum is σ = 1600640078. Its totient is φ = 1600640076.

The previous prime is 1600640053. The next prime is 1600640089. The reversal of 1600640077 is 7700460061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1298088841 + 302551236 = 36029^2 + 17394^2 .

It is a cyclic number.

It is not a de Polignac number, because 1600640077 - 2¹¹ = 1600638029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1600640177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800320038 + 800320039.

It is an arithmetic number, because the mean of its divisors is an integer number (800320039).

Almost surely, 2^1600640077 is an apocalyptic number.

It is an amenable number.

1600640077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1600640077 is an equidigital number, since it uses as much as digits as its factorization.

1600640077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 1600640077 is about 40008.0001624675. Note that the first 3 decimals coincide. The cubic root of 1600640077 is about 1169.7630408669.

The spelling of 1600640077 in words is "one billion, six hundred million, six hundred forty thousand, seventy-seven".