655173120 has 240 divisors, whose sum is σ = 2437866288. Its totient is φ = 149667840.

The previous prime is 655173119. The next prime is 655173139. The reversal of 655173120 is 21371556.

It is a tau number, because it is divible by the number of its divisors (240).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 375450 + ... + 377190.

Almost surely, 2^655173120 is an apocalyptic number.

655173120 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 655173120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1218933144).

655173120 is an abundant number, since it is smaller than the sum of its proper divisors (1782693168).

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

655173120 is a wasteful number, since it uses less digits than its factorization.

655173120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781 (or 1758 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 655173120 is about 25596.3497397578. The cubic root of 655173120 is about 868.5310659255.

The spelling of 655173120 in words is "six hundred fifty-five million, one hundred seventy-three thousand, one hundred twenty".