655418005920 has 1536 divisors, whose sum is σ = 2605211320320. Its totient is φ = 155196518400.

The previous prime is 655418005919. The next prime is 655418005939. The reversal of 655418005920 is 29500814556.

655418005920 is a `hidden beast` number, since 6 + 5 + 54 + 1 + 8 + 0 + 0 + 592 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 9231239485 + ... + 9231239555.

It is an arithmetic number, because the mean of its divisors is an integer number (1696101120).

Almost surely, 2^655418005920 is an apocalyptic number.

655418005920 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 655418005920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1302605660160).

655418005920 is an abundant number, since it is smaller than the sum of its proper divisors (1949793314400).

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

655418005920 is a wasteful number, since it uses less digits than its factorization.

655418005920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The spelling of 655418005920 in words is "six hundred fifty-five billion, four hundred eighteen million, five thousand, nine hundred twenty".