655440464550 has 96 divisors (see below), whose sum is σ = 1685954975904. Its totient is φ = 168376320000.

The previous prime is 655440464537. The next prime is 655440464563. The reversal of 655440464550 is 55464044556.

It is a happy number.

655440464550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (655440464537) and next prime (655440464563).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 655440464550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24091 + ... + 1145190.

It is an arithmetic number, because the mean of its divisors is an integer number (17562030999).

Almost surely, 2^655440464550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655440464550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (842977487952).

655440464550 is an abundant number, since it is smaller than the sum of its proper divisors (1030514511354).

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

655440464550 is a wasteful number, since it uses less digits than its factorization.

655440464550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169434 (or 1169429 counting only the distinct ones).

The product of its (nonzero) digits is 5760000, while the sum is 48.

The spelling of 655440464550 in words is "six hundred fifty-five billion, four hundred forty million, four hundred sixty-four thousand, five hundred fifty".