655157217960 has 384 divisors, whose sum is σ = 2712197779200. Its totient is φ = 133523251200.

The previous prime is 655157217937. The next prime is 655157217971. The reversal of 655157217960 is 69712751556.

655157217960 is a `hidden beast` number, since 6 + 5 + 5 + 1 + 572 + 1 + 7 + 9 + 60 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 655157217897 and 655157217906.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 411510 + ... + 1216410.

It is an arithmetic number, because the mean of its divisors is an integer number (7063015050).

Almost surely, 2^655157217960 is an apocalyptic number.

655157217960 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655157217960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1356098889600).

655157217960 is an abundant number, since it is smaller than the sum of its proper divisors (2057040561240).

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

655157217960 is a wasteful number, since it uses less digits than its factorization.

655157217960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804961 (or 804954 counting only the distinct ones).

The product of its (nonzero) digits is 3969000, while the sum is 54.

The spelling of 655157217960 in words is "six hundred fifty-five billion, one hundred fifty-seven million, two hundred seventeen thousand, nine hundred sixty".