655347672 has 128 divisors (see below), whose sum is σ = 2106547200. Its totient is φ = 187207200.

The previous prime is 655347661. The next prime is 655347689. The reversal of 655347672 is 276743556.

655347672 is a `hidden beast` number, since 65 + 53 + 476 + 72 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119797 + ... + 125147.

It is an arithmetic number, because the mean of its divisors is an integer number (16457400).

Almost surely, 2^655347672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655347672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1053273600).

655347672 is an abundant number, since it is smaller than the sum of its proper divisors (1451199528).

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

655347672 is an equidigital number, since it uses as much as digits as its factorization.

655347672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5385 (or 5363 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 45.

The square root of 655347672 is about 25599.7592176177. The cubic root of 655347672 is about 868.6081907690.

The spelling of 655347672 in words is "six hundred fifty-five million, three hundred forty-seven thousand, six hundred seventy-two".