11520012001545 has 48 divisors (see below), whose sum is σ = 20272438809792. Its totient is φ = 6050397133440.

The previous prime is 11520012001541. The next prime is 11520012001567. The reversal of 11520012001545 is 54510021002511.

It is a happy number.

11520012001545 is a `hidden beast` number, since 1 + 1 + 520 + 0 + 120 + 0 + 15 + 4 + 5 = 666.

It is not a de Polignac number, because 11520012001545 - 2² = 11520012001541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11520012001541) 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 47 ways as a sum of consecutive naturals, for example, 8990134 + ... + 10191296.

It is an arithmetic number, because the mean of its divisors is an integer number (422342475204).

Almost surely, 2^{11520012001545} is an apocalyptic number.

11520012001545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11520012001545 is a deficient number, since it is larger than the sum of its proper divisors (8752426808247).

11520012001545 is a wasteful number, since it uses less digits than its factorization.

11520012001545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204422 (or 1204419 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The spelling of 11520012001545 in words is "eleven trillion, five hundred twenty billion, twelve million, one thousand, five hundred forty-five".