201771017708025 has 12 divisors (see below), whose sum is σ = 333594749277392. Its totient is φ = 107611209444240.

The previous prime is 201771017708011. The next prime is 201771017708027. The reversal of 201771017708025 is 520807710177102.

It is not a de Polignac number, because 201771017708025 - 2⁹ = 201771017707513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201771017708027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1345140117979 + ... + 1345140118128.

Almost surely, 2^{201771017708025} is an apocalyptic number.

201771017708025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

201771017708025 is a deficient number, since it is larger than the sum of its proper divisors (131823731569367).

201771017708025 is a wasteful number, since it uses less digits than its factorization.

201771017708025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2690280236120 (or 2690280236115 counting only the distinct ones).

The product of its (nonzero) digits is 384160, while the sum is 48.

The spelling of 201771017708025 in words is "two hundred one trillion, seven hundred seventy-one billion, seventeen million, seven hundred eight thousand, twenty-five".