11520525523563 has 72 divisors (see below), whose sum is σ = 19724473689648. Its totient is φ = 6459331350528.

The previous prime is 11520525523547. The next prime is 11520525523627. The reversal of 11520525523563 is 36532552502511.

It is a happy number.

11520525523563 is a `hidden beast` number, since 1 + 1 + 5 + 2 + 0 + 5 + 2 + 552 + 35 + 63 = 666.

It is not a de Polignac number, because 11520525523563 - 2⁴ = 11520525523547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11520525523513) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5286156 + ... + 7140342.

Almost surely, 2^{11520525523563} is an apocalyptic number.

11520525523563 is a deficient number, since it is larger than the sum of its proper divisors (8203948166085).

11520525523563 is a wasteful number, since it uses less digits than its factorization.

11520525523563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854473 (or 1854463 counting only the distinct ones).

The product of its (nonzero) digits is 1350000, while the sum is 45.

The spelling of 11520525523563 in words is "eleven trillion, five hundred twenty billion, five hundred twenty-five million, five hundred twenty-three thousand, five hundred sixty-three".