206171491436 has 12 divisors (see below), whose sum is σ = 361169410728. Its totient is φ = 102980231232.

The previous prime is 206171491429. The next prime is 206171491531. The reversal of 206171491436 is 634194171602.

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, 26374226 + ... + 26382041.

It is an arithmetic number, because the mean of its divisors is an integer number (30097450894).

Almost surely, 2^206171491436 is an apocalyptic number.

It is an amenable number.

206171491436 is a deficient number, since it is larger than the sum of its proper divisors (154997919292).

206171491436 is a wasteful number, since it uses less digits than its factorization.

206171491436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52757248 (or 52757246 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 206171491436 in words is "two hundred six billion, one hundred seventy-one million, four hundred ninety-one thousand, four hundred thirty-six".