11520055457 has 8 divisors (see below), whose sum is σ = 12236681736. Its totient is φ = 10807759872.

The previous prime is 11520055427. The next prime is 11520055489. The reversal of 11520055457 is 75455002511.

It can be written as a sum of positive squares in 4 ways, for example, as 2876820496 + 8643234961 = 53636^2 + 92969^2 .

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 11520055457 - 2¹⁰ = 11520054433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11520055427) 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, 1077188 + ... + 1087829.

It is an arithmetic number, because the mean of its divisors is an integer number (1529585217).

Almost surely, 2^11520055457 is an apocalyptic number.

11520055457 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

11520055457 is a deficient number, since it is larger than the sum of its proper divisors (716626279).

11520055457 is a wasteful number, since it uses less digits than its factorization.

11520055457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2165347.

The product of its (nonzero) digits is 35000, while the sum is 35.

Adding to 11520055457 its reverse (75455002511), we get a palindrome (86975057968).

The spelling of 11520055457 in words is "eleven billion, five hundred twenty million, fifty-five thousand, four hundred fifty-seven".