918661995 has 24 divisors (see below), whose sum is σ = 1596162672. Its totient is φ = 488779200.

The previous prime is 918661979. The next prime is 918662009. The reversal of 918661995 is 599166819.

918661995 is a `hidden beast` number, since 9 + 18 + 6 + 619 + 9 + 5 = 666.

It is not a de Polignac number, because 918661995 - 2⁴ = 918661979 is a prime.

It is a super-2 number, since 2×918661995² = 1687879722114760050, which contains 22 as substring.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 5301 + ... + 43190.

It is an arithmetic number, because the mean of its divisors is an integer number (66506778).

Almost surely, 2^918661995 is an apocalyptic number.

918661995 is a deficient number, since it is larger than the sum of its proper divisors (677500677).

918661995 is a wasteful number, since it uses less digits than its factorization.

918661995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48923 (or 48920 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 54.

The square root of 918661995 is about 30309.4373916772. The cubic root of 918661995 is about 972.1171015498.

The spelling of 918661995 in words is "nine hundred eighteen million, six hundred sixty-one thousand, nine hundred ninety-five".