655021712 has 10 divisors (see below), whose sum is σ = 1269104598. Its totient is φ = 327510848.

The previous prime is 655021711. The next prime is 655021771. The reversal of 655021712 is 217120556.

It can be written as a sum of positive squares in only one way, i.e., 619213456 + 35808256 = 24884^2 + 5984^2 .

It is not an unprimeable number, because it can be changed into a prime (655021711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20469413 + ... + 20469444.

Almost surely, 2^655021712 is an apocalyptic number.

It is an amenable number.

655021712 is a deficient number, since it is larger than the sum of its proper divisors (614082886).

655021712 is a wasteful number, since it uses less digits than its factorization.

655021712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40938865 (or 40938859 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 655021712 is about 25593.3919596446. The cubic root of 655021712 is about 868.4641560361.

The spelling of 655021712 in words is "six hundred fifty-five million, twenty-one thousand, seven hundred twelve".