206551386165908 has 48 divisors (see below), whose sum is σ = 413544823985664. Its totient is φ = 88427305735680.

The previous prime is 206551386165899. The next prime is 206551386165961. The reversal of 206551386165908 is 809561683155602.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 629598485 + ... + 629926467.

It is an arithmetic number, because the mean of its divisors is an integer number (8615517166368).

Almost surely, 2^{206551386165908} is an apocalyptic number.

206551386165908 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

206551386165908 is an abundant number, since it is smaller than the sum of its proper divisors (206993437819756).

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

206551386165908 is a wasteful number, since it uses less digits than its factorization.

206551386165908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351992 (or 351990 counting only the distinct ones).

The product of its (nonzero) digits is 93312000, while the sum is 65.

The spelling of 206551386165908 in words is "two hundred six trillion, five hundred fifty-one billion, three hundred eighty-six million, one hundred sixty-five thousand, nine hundred eight".