205275440630 has 64 divisors (see below), whose sum is σ = 411869525760. Its totient is φ = 73139598336.

The previous prime is 205275440627. The next prime is 205275440639. The reversal of 205275440630 is 36044572502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205275440639) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7197779 + ... + 7226241.

It is an arithmetic number, because the mean of its divisors is an integer number (6435461340).

Almost surely, 2^205275440630 is an apocalyptic number.

205275440630 is an abundant number, since it is smaller than the sum of its proper divisors (206594085130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205275440630 is a wasteful number, since it uses less digits than its factorization.

205275440630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30425.

The product of its (nonzero) digits is 201600, while the sum is 38.

The spelling of 205275440630 in words is "two hundred five billion, two hundred seventy-five million, four hundred forty thousand, six hundred thirty".