205662040415 has 16 divisors (see below), whose sum is σ = 267871392768. Its totient is φ = 150677646336.

The previous prime is 205662040387. The next prime is 205662040531. The reversal of 205662040415 is 514040266502.

It is a cyclic number.

It is not a de Polignac number, because 205662040415 - 2²⁰ = 205660991839 is a prime.

It is a super-2 number, since 2×205662040415² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

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, 12448562 + ... + 12465071.

It is an arithmetic number, because the mean of its divisors is an integer number (16741962048).

Almost surely, 2^205662040415 is an apocalyptic number.

205662040415 is a deficient number, since it is larger than the sum of its proper divisors (62209352353).

205662040415 is a wasteful number, since it uses less digits than its factorization.

205662040415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24913778.

The product of its (nonzero) digits is 57600, while the sum is 35.

The spelling of 205662040415 in words is "two hundred five billion, six hundred sixty-two million, forty thousand, four hundred fifteen".