205464024456 has 128 divisors (see below), whose sum is σ = 550262400000. Its totient is φ = 63738005760.

The previous prime is 205464024433. The next prime is 205464024463. The reversal of 205464024456 is 654420464502.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23889645 + ... + 23898243.

It is an arithmetic number, because the mean of its divisors is an integer number (4298925000).

Almost surely, 2^205464024456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205464024456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275131200000).

205464024456 is an abundant number, since it is smaller than the sum of its proper divisors (344798375544).

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

205464024456 is a wasteful number, since it uses less digits than its factorization.

205464024456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9547 (or 9543 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 42.

Adding to 205464024456 its reverse (654420464502), we get a palindrome (859884488958).

The spelling of 205464024456 in words is "two hundred five billion, four hundred sixty-four million, twenty-four thousand, four hundred fifty-six".