655605022400 has 168 divisors, whose sum is σ = 1660881717600. Its totient is φ = 254555136000.

The previous prime is 655605022381. The next prime is 655605022427. The reversal of 655605022400 is 4220506556.

It is a super-2 number, since 2×655605022400² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13029290 + ... + 13079510.

It is an arithmetic number, because the mean of its divisors is an integer number (9886200700).

Almost surely, 2^655605022400 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 655605022400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (830440858800).

655605022400 is an abundant number, since it is smaller than the sum of its proper divisors (1005276695200).

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

655605022400 is a wasteful number, since it uses less digits than its factorization.

655605022400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50483 (or 50468 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 655605022400 its reverse (4220506556), we get a palindrome (659825528956).

The spelling of 655605022400 in words is "six hundred fifty-five billion, six hundred five million, twenty-two thousand, four hundred".