206497213664 has 96 divisors (see below), whose sum is σ = 472591752192. Its totient is φ = 86982336000.

The previous prime is 206497213627. The next prime is 206497213673. The reversal of 206497213664 is 466312794602.

It is a congruent number.

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, 20914649 + ... + 20924519.

It is an arithmetic number, because the mean of its divisors is an integer number (4922830752).

Almost surely, 2^206497213664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206497213664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236295876096).

206497213664 is an abundant number, since it is smaller than the sum of its proper divisors (266094538528).

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

206497213664 is a wasteful number, since it uses less digits than its factorization.

206497213664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11480 (or 11472 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 50.

The spelling of 206497213664 in words is "two hundred six billion, four hundred ninety-seven million, two hundred thirteen thousand, six hundred sixty-four".