11323561644 has 24 divisors (see below), whose sum is σ = 29357382320. Its totient is φ = 3774520512.

The previous prime is 11323561619. The next prime is 11323561663. The reversal of 11323561644 is 44616532311.

11323561644 is a `hidden beast` number, since 1 + 1 + 3 + 2 + 3 + 5 + 6 + 1 + 644 = 666.

It is a super-3 number, since 3×11323561644³ (a number of 31 digits) contains 333 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 11323561599 and 11323561608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52423789 + ... + 52424004.

Almost surely, 2^11323561644 is an apocalyptic number.

It is an amenable number.

11323561644 is an abundant number, since it is smaller than the sum of its proper divisors (18033820676).

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

11323561644 is a wasteful number, since it uses less digits than its factorization.

11323561644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104847806 (or 104847798 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The spelling of 11323561644 in words is "eleven billion, three hundred twenty-three million, five hundred sixty-one thousand, six hundred forty-four".