655909954560 has 2112 divisors, whose sum is σ = 2896979904000. Its totient is φ = 142021361664.

The previous prime is 655909954541. The next prime is 655909954577. The reversal of 655909954560 is 65459909556.

655909954560 is a `hidden beast` number, since 6 + 5 + 5 + 90 + 9 + 95 + 456 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 12375659494 + ... + 12375659546.

Almost surely, 2^655909954560 is an apocalyptic number.

655909954560 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 655909954560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1448489952000).

655909954560 is an abundant number, since it is smaller than the sum of its proper divisors (2241069949440).

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

655909954560 is an equidigital number, since it uses as much as digits as its factorization.

655909954560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 65610000, while the sum is 63.

The spelling of 655909954560 in words is "six hundred fifty-five billion, nine hundred nine million, nine hundred fifty-four thousand, five hundred sixty".