206138935060 has 24 divisors (see below), whose sum is σ = 447819067080. Its totient is φ = 79612278144.

The previous prime is 206138935043. The next prime is 206138935061. The reversal of 206138935060 is 60539831602.

It can be written as a sum of positive squares in 4 ways, for example, as 70975353744 + 135163581316 = 266412^2 + 367646^2 .

It is a super-3 number, since 3×206138935060³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 206138934998 and 206138935016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206138935061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177705399 + ... + 177706558.

It is an arithmetic number, because the mean of its divisors is an integer number (18659127795).

Almost surely, 2^206138935060 is an apocalyptic number.

206138935060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206138935060 is an abundant number, since it is smaller than the sum of its proper divisors (241680132020).

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

206138935060 is a wasteful number, since it uses less digits than its factorization.

206138935060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355411995 (or 355411993 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 206138935060 in words is "two hundred six billion, one hundred thirty-eight million, nine hundred thirty-five thousand, sixty".