11520312451405 has 8 divisors (see below), whose sum is σ = 13837023049752. Its totient is φ = 9207817889088.

The previous prime is 11520312451397. The next prime is 11520312451429. The reversal of 11520312451405 is 50415421302511.

It can be written as a sum of positive squares in 4 ways, for example, as 2409489376009 + 9110823075396 = 1552253^2 + 3018414^2 .

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 11520312451405 - 2³ = 11520312451397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1054002994 + ... + 1054013923.

It is an arithmetic number, because the mean of its divisors is an integer number (1729627881219).

Almost surely, 2^{11520312451405} is an apocalyptic number.

It is an amenable number.

11520312451405 is a deficient number, since it is larger than the sum of its proper divisors (2316710598347).

11520312451405 is a wasteful number, since it uses less digits than its factorization.

11520312451405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108018015.

The product of its (nonzero) digits is 24000, while the sum is 34.

Adding to 11520312451405 its reverse (50415421302511), we get a palindrome (61935733753916).

The spelling of 11520312451405 in words is "eleven trillion, five hundred twenty billion, three hundred twelve million, four hundred fifty-one thousand, four hundred five".