655105500000 has 756 divisors, whose sum is σ = 2709767580156. Its totient is φ = 149688000000.

The previous prime is 655105499989. The next prime is 655105500011. The reversal of 655105500000 is 5501556.

655105500000 is a `hidden beast` number, since 6 + 55 + 105 + 500 + 0 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (655105499989) and next prime (655105500011).

It is a super-2 number, since 2×655105500000² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 125 ways as a sum of consecutive naturals, for example, 220498515 + ... + 220501485.

It is an arithmetic number, because the mean of its divisors is an integer number (3584348651).

Almost surely, 2^655105500000 is an apocalyptic number.

655105500000 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 655105500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1354883790078).

655105500000 is an abundant number, since it is smaller than the sum of its proper divisors (2054662080156).

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

655105500000 is an equidigital number, since it uses as much as digits as its factorization.

655105500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3031 (or 2988 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The spelling of 655105500000 in words is "six hundred fifty-five billion, one hundred five million, five hundred thousand".