1236016968169 has 9 divisors (see below), whose sum is σ = 1240071450807. Its totient is φ = 1231975709664.

The previous prime is 1236016968149. The next prime is 1236016968227. The reversal of 1236016968169 is 9618696106321.

It is a happy number.

The square root of 1236016968169 is 1111763.

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

It can be written as a sum of positive squares in only one way, i.e., 333304155625 + 902712812544 = 577325^2 + 950112^2 .

It is not a de Polignac number, because 1236016968169 - 2²⁷ = 1235882750441 is a prime.

It is a super-2 number, since 2×1236016968169² (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 (1236016968139) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 374662482 + ... + 374665780.

Almost surely, 2^{1236016968169} is an apocalyptic number.

1236016968169 is the 1111763-rd square number.

1236016968169 is the 555882-nd centered octagonal number.

It is an amenable number.

1236016968169 is a deficient number, since it is larger than the sum of its proper divisors (4054482638).

1236016968169 is an frugal number, since it uses more digits than its factorization.

1236016968169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7272 (or 3636 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 58.

The spelling of 1236016968169 in words is "one trillion, two hundred thirty-six billion, sixteen million, nine hundred sixty-eight thousand, one hundred sixty-nine".