655939556 has 6 divisors (see below), whose sum is σ = 1147894230. Its totient is φ = 327969776.

The previous prime is 655939549. The next prime is 655939573.

655939556 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 375041956 + 280897600 = 19366^2 + 16760^2 .

It is a super-2 number, since 2×655939556² = 860513402250954272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 655939498 and 655939507.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81992441 + ... + 81992448.

It is an arithmetic number, because the mean of its divisors is an integer number (191315705).

Almost surely, 2^655939556 is an apocalyptic number.

It is an amenable number.

655939556 is a deficient number, since it is larger than the sum of its proper divisors (491954674).

655939556 is a wasteful number, since it uses less digits than its factorization.

655939556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163984893 (or 163984891 counting only the distinct ones).

The product of its digits is 5467500, while the sum is 53.

The square root of 655939556 is about 25611.3169516915. The cubic root of 655939556 is about 868.8696095618.

The spelling of 655939556 in words is "six hundred fifty-five million, nine hundred thirty-nine thousand, five hundred fifty-six".