11515971807653 has 8 divisors (see below), whose sum is σ = 11673819495000. Its totient is φ = 11358126678528.

The previous prime is 11515971807617. The next prime is 11515971807719. The reversal of 11515971807653 is 35670817951511.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6304508330884 + 5211463476769 = 2510878^2 + 2282863^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11515971807653 - 2¹⁶ = 11515971742117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11515971807592 and 11515971807601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11515971806653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9524723 + ... + 10665471.

It is an arithmetic number, because the mean of its divisors is an integer number (1459227436875).

Almost surely, 2^{11515971807653} is an apocalyptic number.

It is an amenable number.

11515971807653 is a deficient number, since it is larger than the sum of its proper divisors (157847687347).

11515971807653 is a wasteful number, since it uses less digits than its factorization.

11515971807653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279111.

The product of its (nonzero) digits is 7938000, while the sum is 59.

The spelling of 11515971807653 in words is "eleven trillion, five hundred fifteen billion, nine hundred seventy-one million, eight hundred seven thousand, six hundred fifty-three".