208653097025 has 6 divisors (see below), whose sum is σ = 258729840342. Its totient is φ = 166922477600.

The previous prime is 208653097001. The next prime is 208653097063. The reversal of 208653097025 is 520790356802.

It can be written as a sum of positive squares in 3 ways, for example, as 11893429249 + 196759667776 = 109057^2 + 443576^2 .

It is not a de Polignac number, because 208653097025 - 2¹⁴ = 208653080641 is a prime.

It is a super-2 number, since 2×208653097025² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4173061916 + ... + 4173061965.

It is an arithmetic number, because the mean of its divisors is an integer number (43121640057).

Almost surely, 2^208653097025 is an apocalyptic number.

208653097025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

208653097025 is a deficient number, since it is larger than the sum of its proper divisors (50076743317).

208653097025 is an equidigital number, since it uses as much as digits as its factorization.

208653097025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8346123891 (or 8346123886 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 208653097025 in words is "two hundred eight billion, six hundred fifty-three million, ninety-seven thousand, twenty-five".