65557300040 has 32 divisors (see below), whose sum is σ = 151490521080. Its totient is φ = 25514191872.

The previous prime is 65557300033. The next prime is 65557300091. The reversal of 65557300040 is 4000375556.

It can be written as a sum of positive squares in 4 ways, for example, as 43899468484 + 21657831556 = 209522^2 + 147166^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22146257 + ... + 22149216.

Almost surely, 2^65557300040 is an apocalyptic number.

It is an amenable number.

65557300040 is an abundant number, since it is smaller than the sum of its proper divisors (85933221040).

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

65557300040 is a wasteful number, since it uses less digits than its factorization.

65557300040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44295521 (or 44295517 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 35.

Adding to 65557300040 its reverse (4000375556), we get a palindrome (69557675596).

The spelling of 65557300040 in words is "sixty-five billion, five hundred fifty-seven million, three hundred thousand, forty".