12016507644 has 36 divisors (see below), whose sum is σ = 30396300480. Its totient is φ = 4002701760.

The previous prime is 12016507637. The next prime is 12016507661. The reversal of 12016507644 is 44670561021.

12016507644 is a `hidden beast` number, since 1 + 2 + 0 + 1 + 6 + 5 + 0 + 7 + 644 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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 = 12016507599 and 12016507608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64177 + ... + 167784.

It is an arithmetic number, because the mean of its divisors is an integer number (844341680).

Almost surely, 2^12016507644 is an apocalyptic number.

It is an amenable number.

12016507644 is an abundant number, since it is smaller than the sum of its proper divisors (18379792836).

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

12016507644 is a wasteful number, since it uses less digits than its factorization.

12016507644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233410 (or 233405 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 12016507644 in words is "twelve billion, sixteen million, five hundred seven thousand, six hundred forty-four".