206237689955 has 64 divisors (see below), whose sum is σ = 286423050240. Its totient is φ = 141087513600.

The previous prime is 206237689943. The next prime is 206237689961. The reversal of 206237689955 is 559986732602.

It is a Cunningham number, because it is equal to 454134²-1.

It is not a de Polignac number, because 206237689955 - 2¹² = 206237685859 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33148745 + ... + 33154965.

It is an arithmetic number, because the mean of its divisors is an integer number (4475360160).

Almost surely, 2^206237689955 is an apocalyptic number.

206237689955 is a deficient number, since it is larger than the sum of its proper divisors (80185360285).

206237689955 is a wasteful number, since it uses less digits than its factorization.

206237689955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6692.

The product of its (nonzero) digits is 48988800, while the sum is 62.

The spelling of 206237689955 in words is "two hundred six billion, two hundred thirty-seven million, six hundred eighty-nine thousand, nine hundred fifty-five".