208616051690 has 16 divisors (see below), whose sum is σ = 376489340928. Its totient is φ = 83228543376.

The previous prime is 208616051689. The next prime is 208616051713. The reversal of 208616051690 is 96150616802.

208616051690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×208616051690² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27230642 + ... + 27238301.

It is an arithmetic number, because the mean of its divisors is an integer number (23530583808).

Almost surely, 2^208616051690 is an apocalyptic number.

208616051690 is a deficient number, since it is larger than the sum of its proper divisors (167873289238).

208616051690 is a wasteful number, since it uses less digits than its factorization.

208616051690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54469333.

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 208616051690 in words is "two hundred eight billion, six hundred sixteen million, fifty-one thousand, six hundred ninety".