11551520452025 has 12 divisors (see below), whose sum is σ = 14324014332012. Its totient is φ = 9241133154240.

The previous prime is 11551520452009. The next prime is 11551520452033. The reversal of 11551520452025 is 52025402515511.

It can be written as a sum of positive squares in 6 ways, for example, as 312472056064 + 11239048395961 = 558992^2 + 3352469^2 .

It is not a de Polignac number, because 11551520452025 - 2⁴ = 11551520452009 is a prime.

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 11551520452025.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 831839 + ... + 4878011.

It is an arithmetic number, because the mean of its divisors is an integer number (1193667861001).

Almost surely, 2^{11551520452025} is an apocalyptic number.

It is an amenable number.

11551520452025 is a deficient number, since it is larger than the sum of its proper divisors (2772493879987).

11551520452025 is a wasteful number, since it uses less digits than its factorization.

11551520452025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4160380 (or 4160375 counting only the distinct ones).

The product of its (nonzero) digits is 100000, while the sum is 38.

Adding to 11551520452025 its reverse (52025402515511), we get a palindrome (63576922967536).

The spelling of 11551520452025 in words is "eleven trillion, five hundred fifty-one billion, five hundred twenty million, four hundred fifty-two thousand, twenty-five".