205408670672 has 10 divisors (see below), whose sum is σ = 397979299458. Its totient is φ = 102704335328.

The previous prime is 205408670669. The next prime is 205408670689. The reversal of 205408670672 is 276076804502.

It can be written as a sum of positive squares in only one way, i.e., 145218917776 + 60189752896 = 381076^2 + 245336^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6419020943 + ... + 6419020974.

Almost surely, 2^205408670672 is an apocalyptic number.

It is an amenable number.

205408670672 is a deficient number, since it is larger than the sum of its proper divisors (192570628786).

205408670672 is a wasteful number, since it uses less digits than its factorization.

205408670672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12838041925 (or 12838041919 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 47.

The spelling of 205408670672 in words is "two hundred five billion, four hundred eight million, six hundred seventy thousand, six hundred seventy-two".