206411472740 has 72 divisors (see below), whose sum is σ = 478430599416. Its totient is φ = 74747059200.

The previous prime is 206411472731. The next prime is 206411472769. The reversal of 206411472740 is 47274114602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6900957184 + 199510515556 = 83072^2 + 446666^2 .

It is a junction number, because it is equal to n+sod(n) for n = 206411472694 and 206411472703.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 406262 + ... + 760178.

Almost surely, 2^206411472740 is an apocalyptic number.

206411472740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206411472740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239215299708).

206411472740 is an abundant number, since it is smaller than the sum of its proper divisors (272019126676).

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

206411472740 is a wasteful number, since it uses less digits than its factorization.

206411472740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354189 (or 354176 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 38.

The spelling of 206411472740 in words is "two hundred six billion, four hundred eleven million, four hundred seventy-two thousand, seven hundred forty".