655155216 has 135 divisors (see below), whose sum is σ = 1928353791. Its totient is φ = 215620704.

The previous prime is 655155199. The next prime is 655155223. The reversal of 655155216 is 612551556.

The square root of 655155216 is 25596.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 8293065 + ... + 8293143.

Almost surely, 2^655155216 is an apocalyptic number.

655155216 is the 25596-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655155216

655155216 is an abundant number, since it is smaller than the sum of its proper divisors (1273198575).

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

655155216 is an frugal number, since it uses more digits than its factorization.

655155216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 84 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

The cubic root of 655155216 is about 868.5231543667.

Multiplying 655155216 by its sum of digits (36), we get a square (23585587776 = 153576²).

655155216 divided by its sum of digits (36) gives a square (18198756 = 4266²).

The spelling of 655155216 in words is "six hundred fifty-five million, one hundred fifty-five thousand, two hundred sixteen".