16620725384 has 8 divisors (see below), whose sum is σ = 31163860110. Its totient is φ = 8310362688.

The previous prime is 16620725383. The next prime is 16620725431. The reversal of 16620725384 is 48352702661.

It can be written as a sum of positive squares in only one way, i.e., 14037036484 + 2583688900 = 118478^2 + 50830^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (16620725383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1038795329 + ... + 1038795344.

Almost surely, 2^16620725384 is an apocalyptic number.

It is an amenable number.

16620725384 is a deficient number, since it is larger than the sum of its proper divisors (14543134726).

16620725384 is a wasteful number, since it uses less digits than its factorization.

16620725384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077590679 (or 2077590675 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 16620725384 in words is "sixteen billion, six hundred twenty million, seven hundred twenty-five thousand, three hundred eighty-four".