206220571661604 has 48 divisors (see below), whose sum is σ = 481739914607616. Its totient is φ = 68660438246400.

The previous prime is 206220571661593. The next prime is 206220571661617. The reversal of 206220571661604 is 406166175022602.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33926854 + ... + 39540770.

It is an arithmetic number, because the mean of its divisors is an integer number (10036248220992).

Almost surely, 2^{206220571661604} is an apocalyptic number.

It is an amenable number.

206220571661604 is an abundant number, since it is smaller than the sum of its proper divisors (275519342946012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206220571661604 is a wasteful number, since it uses less digits than its factorization.

206220571661604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5617476 (or 5617474 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 206220571661604 in words is "two hundred six trillion, two hundred twenty billion, five hundred seventy-one million, six hundred sixty-one thousand, six hundred four".