205402412269 has 4 divisors (see below), whose sum is σ = 205576335900. Its totient is φ = 205228488640.

The previous prime is 205402412233. The next prime is 205402412317. The reversal of 205402412269 is 962214204502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 962214204502 = 2 ⋅481107102251.

It can be written as a sum of positive squares in 2 ways, for example, as 188816320900 + 16586091369 = 434530^2 + 128787^2 .

It is a cyclic number.

It is not a de Polignac number, because 205402412269 - 2⁷ = 205402412141 is a prime.

It is a super-2 number, since 2×205402412269² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205402412669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86960044 + ... + 86962405.

It is an arithmetic number, because the mean of its divisors is an integer number (51394083975).

Almost surely, 2^205402412269 is an apocalyptic number.

It is an amenable number.

205402412269 is a deficient number, since it is larger than the sum of its proper divisors (173923631).

205402412269 is a wasteful number, since it uses less digits than its factorization.

205402412269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173923630.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 205402412269 in words is "two hundred five billion, four hundred two million, four hundred twelve thousand, two hundred sixty-nine".