208847072649 has 16 divisors (see below), whose sum is σ = 289608907520. Its totient is φ = 133753576320.

The previous prime is 208847072617. The next prime is 208847072659. The reversal of 208847072649 is 946270748802.

It is a happy number.

It is not a de Polignac number, because 208847072649 - 2⁵ = 208847072617 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208847072659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11899492 + ... + 11917029.

It is an arithmetic number, because the mean of its divisors is an integer number (18100556720).

Almost surely, 2^208847072649 is an apocalyptic number.

It is an amenable number.

208847072649 is a deficient number, since it is larger than the sum of its proper divisors (80761834871).

208847072649 is a wasteful number, since it uses less digits than its factorization.

208847072649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23816640.

The product of its (nonzero) digits is 10838016, while the sum is 57.

The spelling of 208847072649 in words is "two hundred eight billion, eight hundred forty-seven million, seventy-two thousand, six hundred forty-nine".