206494748520 has 64 divisors (see below), whose sum is σ = 639467619840. Its totient is φ = 53288966400.

The previous prime is 206494748507. The next prime is 206494748569. The reversal of 206494748520 is 25847494602.

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, 27750951 + ... + 27758390.

It is an arithmetic number, because the mean of its divisors is an integer number (9991681560).

Almost surely, 2^206494748520 is an apocalyptic number.

206494748520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206494748520 is an abundant number, since it is smaller than the sum of its proper divisors (432972871320).

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

206494748520 is a wasteful number, since it uses less digits than its factorization.

206494748520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55509386 (or 55509382 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 51.

The spelling of 206494748520 in words is "two hundred six billion, four hundred ninety-four million, seven hundred forty-eight thousand, five hundred twenty".