20161616144 has 20 divisors (see below), whose sum is σ = 39082754124. Its totient is φ = 10075744128.

The previous prime is 20161616131. The next prime is 20161616159. The reversal of 20161616144 is 44161616102.

It can be written as a sum of positive squares in 2 ways, for example, as 807241744 + 19354374400 = 28412^2 + 139120^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20161616144.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283547 + ... + 347450.

Almost surely, 2^20161616144 is an apocalyptic number.

It is an amenable number.

20161616144 is a deficient number, since it is larger than the sum of its proper divisors (18921137980).

20161616144 is a wasteful number, since it uses less digits than its factorization.

20161616144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633002 (or 632996 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The spelling of 20161616144 in words is "twenty billion, one hundred sixty-one million, six hundred sixteen thousand, one hundred forty-four".