918656506 has 16 divisors (see below), whose sum is σ = 1459615464. Its totient is φ = 432139264.

The previous prime is 918656503. The next prime is 918656513. The reversal of 918656506 is 605656819.

It can be written as a sum of positive squares in 4 ways, for example, as 711555625 + 207100881 = 26675^2 + 14391^2 .

It is a super-2 number, since 2×918656506² = 1687859552032256072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (918656503) by changing a digit.

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, 141426 + ... + 147778.

Almost surely, 2^918656506 is an apocalyptic number.

918656506 is a deficient number, since it is larger than the sum of its proper divisors (540958958).

918656506 is a wasteful number, since it uses less digits than its factorization.

918656506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10625.

The product of its (nonzero) digits is 388800, while the sum is 46.

The square root of 918656506 is about 30309.3468421871. The cubic root of 918656506 is about 972.1151654147.

The spelling of 918656506 in words is "nine hundred eighteen million, six hundred fifty-six thousand, five hundred six".