511206656 has 18 divisors (see below), whose sum is σ = 1020416922. Its totient is φ = 255603200.

The previous prime is 511206617. The next prime is 511206673. The reversal of 511206656 is 656602115.

It can be written as a sum of positive squares in only one way, i.e., 484000000 + 27206656 = 22000^2 + 5216^2 .

It is a super-2 number, since 2×511206656² = 522664490277404672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998195 + ... + 998706.

It is an arithmetic number, because the mean of its divisors is an integer number (56689829).

Almost surely, 2^511206656 is an apocalyptic number.

It is an amenable number.

511206656 is a deficient number, since it is larger than the sum of its proper divisors (509210266).

511206656 is an equidigital number, since it uses as much as digits as its factorization.

511206656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996917 (or 1996903 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 511206656 is about 22609.8796104712. The cubic root of 511206656 is about 799.5865863983.

The spelling of 511206656 in words is "five hundred eleven million, two hundred six thousand, six hundred fifty-six".