655616100440 has 32 divisors (see below), whose sum is σ = 1685869973280. Its totient is φ = 224782662912.

The previous prime is 655616100407. The next prime is 655616100443. The reversal of 655616100440 is 44001616556.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 655616100394 and 655616100403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655616100443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1170742757 + ... + 1170743316.

It is an arithmetic number, because the mean of its divisors is an integer number (52683436665).

Almost surely, 2^655616100440 is an apocalyptic number.

It is an amenable number.

655616100440 is an abundant number, since it is smaller than the sum of its proper divisors (1030253872840).

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

655616100440 is a wasteful number, since it uses less digits than its factorization.

655616100440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2341486091 (or 2341486087 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

Adding to 655616100440 its reverse (44001616556), we get a palindrome (699617716996).

The spelling of 655616100440 in words is "six hundred fifty-five billion, six hundred sixteen million, one hundred thousand, four hundred forty".