16647502225 has 12 divisors (see below), whose sum is σ = 21082114944. Its totient is φ = 13034639120.

The previous prime is 16647502211. The next prime is 16647502279. The reversal of 16647502225 is 52220574661.

It is a de Polignac number, because none of the positive numbers 2^k-16647502225 is a prime.

It is a Duffinian 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, 7082869 + ... + 7085218.

It is an arithmetic number, because the mean of its divisors is an integer number (1756842912).

Almost surely, 2^16647502225 is an apocalyptic number.

It is an amenable number.

16647502225 is a deficient number, since it is larger than the sum of its proper divisors (4434612719).

16647502225 is a wasteful number, since it uses less digits than its factorization.

16647502225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14168144 (or 14168139 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 16647502225 in words is "sixteen billion, six hundred forty-seven million, five hundred two thousand, two hundred twenty-five".