11520305451 has 12 divisors (see below), whose sum is σ = 16648106280. Its totient is φ = 7676665920.

The previous prime is 11520305437. The next prime is 11520305471. The reversal of 11520305451 is 15450302511.

11520305451 is a `hidden beast` number, since 1 + 1 + 5 + 203 + 0 + 5 + 451 = 666.

It is not a de Polignac number, because 11520305451 - 2¹⁰ = 11520304427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11520305411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 274110 + ... + 313331.

It is an arithmetic number, because the mean of its divisors is an integer number (1387342190).

Almost surely, 2^11520305451 is an apocalyptic number.

11520305451 is a deficient number, since it is larger than the sum of its proper divisors (5127800829).

11520305451 is a wasteful number, since it uses less digits than its factorization.

11520305451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589626 (or 589623 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 11520305451 its reverse (15450302511), we get a palindrome (26970607962).

It can be divided in two parts, 1152030 and 5451, that added together give a triangular number (1157481 = T₁₅₂₁).

The spelling of 11520305451 in words is "eleven billion, five hundred twenty million, three hundred five thousand, four hundred fifty-one".