11645543016 has 40 divisors (see below), whose sum is σ = 32618305170. Its totient is φ = 3881847456.

The previous prime is 11645542973. The next prime is 11645543033. The reversal of 11645543016 is 61034554611.

11645543016 is a `hidden beast` number, since 1 + 1 + 64 + 554 + 30 + 16 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11076720516 + 568822500 = 105246^2 + 23850^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8985111 + ... + 8986406.

Almost surely, 2^11645543016 is an apocalyptic number.

It is an amenable number.

11645543016 is an abundant number, since it is smaller than the sum of its proper divisors (20972762154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11645543016 is a wasteful number, since it uses less digits than its factorization.

11645543016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17971535 (or 17971522 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 11645543016 in words is "eleven billion, six hundred forty-five million, five hundred forty-three thousand, sixteen".