205651555012 has 12 divisors (see below), whose sum is σ = 362182516780. Its totient is φ = 102170835936.

The previous prime is 205651555003. The next prime is 205651555033. The reversal of 205651555012 is 210555156502.

It can be written as a sum of positive squares in 2 ways, for example, as 37956390976 + 167695164036 = 194824^2 + 409506^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163734687 + ... + 163735942.

Almost surely, 2^205651555012 is an apocalyptic number.

It is an amenable number.

205651555012 is a deficient number, since it is larger than the sum of its proper divisors (156530961768).

205651555012 is a wasteful number, since it uses less digits than its factorization.

205651555012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327470790 (or 327470788 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 37.

The spelling of 205651555012 in words is "two hundred five billion, six hundred fifty-one million, five hundred fifty-five thousand, twelve".