1600711681 has 2 divisors, whose sum is σ = 1600711682. Its totient is φ = 1600711680.

The previous prime is 1600711597. The next prime is 1600711727. The reversal of 1600711681 is 1861170061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1491195456 + 109516225 = 38616^2 + 10465^2 .

It is a cyclic number.

It is not a de Polignac number, because 1600711681 - 2¹⁷ = 1600580609 is a prime.

It is a super-2 number, since 2×1600711681² = 5124555771379691522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1600711081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800355840 + 800355841.

It is an arithmetic number, because the mean of its divisors is an integer number (800355841).

Almost surely, 2^1600711681 is an apocalyptic number.

It is an amenable number.

1600711681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1600711681 is an equidigital number, since it uses as much as digits as its factorization.

1600711681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 1600711681 is about 40008.8950234820. The cubic root of 1600711681 is about 1169.7804835689.

The spelling of 1600711681 in words is "one billion, six hundred million, seven hundred eleven thousand, six hundred eighty-one".