205954068693 has 16 divisors (see below), whose sum is σ = 279300902400. Its totient is φ = 134955659760.

The previous prime is 205954068659. The next prime is 205954068739. The reversal of 205954068693 is 396860459502.

It is not a de Polignac number, because 205954068693 - 2¹⁴ = 205954052309 is a prime.

It is a super-2 number, since 2×205954068693² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205954068193) 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 15 ways as a sum of consecutive naturals, for example, 1170798 + ... + 1335168.

It is an arithmetic number, because the mean of its divisors is an integer number (17456306400).

Almost surely, 2^205954068693 is an apocalyptic number.

It is an amenable number.

205954068693 is a deficient number, since it is larger than the sum of its proper divisors (73346833707).

205954068693 is a wasteful number, since it uses less digits than its factorization.

205954068693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171512.

The product of its (nonzero) digits is 13996800, while the sum is 57.

The spelling of 205954068693 in words is "two hundred five billion, nine hundred fifty-four million, sixty-eight thousand, six hundred ninety-three".