655211380 has 24 divisors (see below), whose sum is σ = 1377401760. Its totient is φ = 261806880.

The previous prime is 655211363. The next prime is 655211393. The reversal of 655211380 is 83112556.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2551 + ... + 36289.

It is an arithmetic number, because the mean of its divisors is an integer number (57391740).

Almost surely, 2^655211380 is an apocalyptic number.

It is an amenable number.

655211380 is an abundant number, since it is smaller than the sum of its proper divisors (722190380).

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

655211380 is a wasteful number, since it uses less digits than its factorization.

655211380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34719 (or 34717 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 655211380 is about 25597.0971010386. The cubic root of 655211380 is about 868.5479720687.

The spelling of 655211380 in words is "six hundred fifty-five million, two hundred eleven thousand, three hundred eighty".