9734778981 has 12 divisors (see below), whose sum is σ = 14172068352. Its totient is φ = 6438750696.

The previous prime is 9734778967. The next prime is 9734779009. The reversal of 9734778981 is 1898774379.

9734778981 is a `hidden beast` number, since 9 + 7 + 3 + 477 + 89 + 81 = 666.

It is not a de Polignac number, because 9734778981 - 2¹⁰ = 9734777957 is a prime.

It is a super-2 number, since 2×9734778981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9734778941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4257291 + ... + 4259576.

It is an arithmetic number, because the mean of its divisors is an integer number (1181005696).

Almost surely, 2^9734778981 is an apocalyptic number.

It is an amenable number.

9734778981 is a deficient number, since it is larger than the sum of its proper divisors (4437289371).

9734778981 is a wasteful number, since it uses less digits than its factorization.

9734778981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8517000 (or 8516997 counting only the distinct ones).

The product of its digits is 21337344, while the sum is 63.

The square root of 9734778981 is about 98664.9835605317. The cubic root of 9734778981 is about 2135.2170657951.

The spelling of 9734778981 in words is "nine billion, seven hundred thirty-four million, seven hundred seventy-eight thousand, nine hundred eighty-one".