1616720487289 has 2 divisors, whose sum is σ = 1616720487290. Its totient is φ = 1616720487288.

The previous prime is 1616720487269. The next prime is 1616720487331. The reversal of 1616720487289 is 9827840276161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1604761971264 + 11958516025 = 1266792^2 + 109355^2 .

It is a cyclic number.

It is not a de Polignac number, because 1616720487289 - 2²⁵ = 1616686932857 is a prime.

It is a super-2 number, since 2×1616720487289² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1616720487269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808360243644 + 808360243645.

It is an arithmetic number, because the mean of its divisors is an integer number (808360243645).

Almost surely, 2^{1616720487289} is an apocalyptic number.

It is an amenable number.

1616720487289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1616720487289 is an equidigital number, since it uses as much as digits as its factorization.

1616720487289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16257024, while the sum is 61.

The spelling of 1616720487289 in words is "one trillion, six hundred sixteen billion, seven hundred twenty million, four hundred eighty-seven thousand, two hundred eighty-nine".