205761120465 has 16 divisors (see below), whose sum is σ = 329228640000. Its totient is φ = 109735648512.

The previous prime is 205761120463. The next prime is 205761120527. The reversal of 205761120465 is 564021167502.

It is not a de Polignac number, because 205761120465 - 2¹ = 205761120463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205761120463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281161 + ... + 700409.

It is an arithmetic number, because the mean of its divisors is an integer number (20576790000).

Almost surely, 2^205761120465 is an apocalyptic number.

It is an amenable number.

205761120465 is a deficient number, since it is larger than the sum of its proper divisors (123467519535).

205761120465 is a wasteful number, since it uses less digits than its factorization.

205761120465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451976.

The product of its (nonzero) digits is 100800, while the sum is 39.

Adding to 205761120465 its reverse (564021167502), we get a palindrome (769782287967).

The spelling of 205761120465 in words is "two hundred five billion, seven hundred sixty-one million, one hundred twenty thousand, four hundred sixty-five".