11551033205513 has 4 divisors (see below), whose sum is σ = 11551049248020. Its totient is φ = 11551017163008.

The previous prime is 11551033205477. The next prime is 11551033205519. The reversal of 11551033205513 is 31550233015511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1695433159744 + 9855600045769 = 1302088^2 + 3139363^2 .

It is a cyclic number.

It is not a de Polignac number, because 11551033205513 - 2¹² = 11551033201417 is a prime.

It is a super-2 number, since 2×11551033205513² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11551033205519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6887828 + ... + 8399061.

It is an arithmetic number, because the mean of its divisors is an integer number (2887762312005).

Almost surely, 2^{11551033205513} is an apocalyptic number.

It is an amenable number.

11551033205513 is a deficient number, since it is larger than the sum of its proper divisors (16042507).

11551033205513 is an equidigital number, since it uses as much as digits as its factorization.

11551033205513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16042506.

The product of its (nonzero) digits is 33750, while the sum is 35.

The spelling of 11551033205513 in words is "eleven trillion, five hundred fifty-one billion, thirty-three million, two hundred five thousand, five hundred thirteen".