206432621516 has 12 divisors (see below), whose sum is σ = 394098641160. Its totient is φ = 93833009760.

The previous prime is 206432621509. The next prime is 206432621531. The reversal of 206432621516 is 615126234602.

It is a super-2 number, since 2×206432621516² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 206432621516.

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 3 ways as a sum of consecutive naturals, for example, 2345825201 + ... + 2345825288.

It is an arithmetic number, because the mean of its divisors is an integer number (32841553430).

Almost surely, 2^206432621516 is an apocalyptic number.

It is an amenable number.

206432621516 is a deficient number, since it is larger than the sum of its proper divisors (187666019644).

206432621516 is a wasteful number, since it uses less digits than its factorization.

206432621516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4691650504 (or 4691650502 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 206432621516 in words is "two hundred six billion, four hundred thirty-two million, six hundred twenty-one thousand, five hundred sixteen".