11613802857409 has 9 divisors (see below), whose sum is σ = 11673730247907. Its totient is φ = 11554181594424.

The previous prime is 11613802857401. The next prime is 11613802857463. The reversal of 11613802857409 is 90475820831611.

The square root of 11613802857409 is 3407903.

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., 11379186623025 + 234616234384 = 3373305^2 + 484372^2 .

It is not a de Polignac number, because 11613802857409 - 2³ = 11613802857401 is a prime.

It is a super-2 number, since 2×11613802857409² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11613802857409.

It is not an unprimeable number, because it can be changed into a prime (11613802857401) 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, 671348242 + ... + 671365540.

It is a 1-persistent number, because it is pandigital, but 2⋅11613802857409 = 23227605714818 is not.

Almost surely, 2^{11613802857409} is an apocalyptic number.

11613802857409 is the 3407903-rd square number.

11613802857409 is the 1703952-nd centered octagonal number.

It is an amenable number.

11613802857409 is a deficient number, since it is larger than the sum of its proper divisors (59927390498).

11613802857409 is an frugal number, since it uses more digits than its factorization.

11613802857409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34992 (or 17496 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 11613802857409 in words is "eleven trillion, six hundred thirteen billion, eight hundred two million, eight hundred fifty-seven thousand, four hundred nine".