1616170636369 has 27 divisors (see below), whose sum is σ = 1678582388433. Its totient is φ = 1556055288000.

The previous prime is 1616170636357. The next prime is 1616170636393. The reversal of 1616170636369 is 9636360716161.

It is a happy number.

The square root of 1616170636369 is 1271287.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 780475969 + 1615390160400 = 27937^2 + 1270980^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1616170636369 is a prime.

It is a super-2 number, since 2×1616170636369² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1616170636319) 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 in 26 ways as a sum of consecutive naturals, for example, 5264399314 + ... + 5264399620.

Almost surely, 2^{1616170636369} is an apocalyptic number.

1616170636369 is the 1271287-th square number.

1616170636369 is the 635644-th centered octagonal number.

It is an amenable number.

1616170636369 is a deficient number, since it is larger than the sum of its proper divisors (62411752064).

1616170636369 is an frugal number, since it uses more digits than its factorization.

1616170636369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 55.

The spelling of 1616170636369 in words is "one trillion, six hundred sixteen billion, one hundred seventy million, six hundred thirty-six thousand, three hundred sixty-nine".