918938847969 has 20 divisors (see below), whose sum is σ = 1404659903856. Its totient is φ = 598378782456.

The previous prime is 918938847929. The next prime is 918938847971. The reversal of 918938847969 is 969748839819.

918938847969 is a `hidden beast` number, since 9 + 1 + 8 + 9 + 3 + 88 + 479 + 69 = 666.

It is not a de Polignac number, because 918938847969 - 2¹² = 918938843873 is a prime.

It is a super-2 number, since 2×918938847969² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is not an unprimeable number, because it can be changed into a prime (918938847929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 131914239 + ... + 131921204.

Almost surely, 2^918938847969 is an apocalyptic number.

It is an amenable number.

918938847969 is a deficient number, since it is larger than the sum of its proper divisors (485721055887).

918938847969 is a wasteful number, since it uses less digits than its factorization.

918938847969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263835498 (or 263835489 counting only the distinct ones).

The product of its digits is 1693052928, while the sum is 81.

The spelling of 918938847969 in words is "nine hundred eighteen billion, nine hundred thirty-eight million, eight hundred forty-seven thousand, nine hundred sixty-nine".