655630511 has 12 divisors (see below), whose sum is σ = 705029832. Its totient is φ = 609386544.

The previous prime is 655630489. The next prime is 655630519. The reversal of 655630511 is 115036556.

It is not a de Polignac number, because 655630511 - 2¹⁸ = 655368367 is a prime.

It is a super-2 number, since 2×655630511² = 859702733908242242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655630519) 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 in 11 ways as a sum of consecutive naturals, for example, 2000 + ... + 36266.

It is an arithmetic number, because the mean of its divisors is an integer number (58752486).

Almost surely, 2^655630511 is an apocalyptic number.

655630511 is a deficient number, since it is larger than the sum of its proper divisors (49399321).

655630511 is a wasteful number, since it uses less digits than its factorization.

655630511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34358 (or 34339 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 32.

The square root of 655630511 is about 25605.2828728761. The cubic root of 655630511 is about 868.7331325607.

The spelling of 655630511 in words is "six hundred fifty-five million, six hundred thirty thousand, five hundred eleven".