11524901643 has 16 divisors (see below), whose sum is σ = 17249952160. Its totient is φ = 7604057088.

The previous prime is 11524901561. The next prime is 11524901701. The reversal of 11524901643 is 34610942511.

It is a happy number.

11524901643 is a `hidden beast` number, since 1 + 1 + 5 + 2 + 4 + 9 + 0 + 1 + 643 = 666.

It is not a de Polignac number, because 11524901643 - 2¹² = 11524897547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11524901598 and 11524901607.

It is not an unprimeable number, because it can be changed into a prime (11524906643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2197630 + ... + 2202867.

It is an arithmetic number, because the mean of its divisors is an integer number (1078122010).

Almost surely, 2^11524901643 is an apocalyptic number.

11524901643 is a deficient number, since it is larger than the sum of its proper divisors (5725050517).

11524901643 is an equidigital number, since it uses as much as digits as its factorization.

11524901643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4400603 (or 4400597 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 11524901643 in words is "eleven billion, five hundred twenty-four million, nine hundred one thousand, six hundred forty-three".