9726975378 has 12 divisors (see below), whose sum is σ = 21075113358. Its totient is φ = 3242325120.

The previous prime is 9726975373. The next prime is 9726975383. The reversal of 9726975378 is 8735796279.

9726975378 is a `hidden beast` number, since 9 + 7 + 2 + 6 + 97 + 537 + 8 = 666.

9726975378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9726975373) and next prime (9726975383).

It can be written as a sum of positive squares in only one way, i.e., 5106102849 + 4620872529 = 71457^2 + 67977^2 .

It is a super-2 number, since 2×9726975378² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9726975371) 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 5 ways as a sum of consecutive naturals, for example, 270193743 + ... + 270193778.

Almost surely, 2^9726975378 is an apocalyptic number.

9726975378 is an abundant number, since it is smaller than the sum of its proper divisors (11348137980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9726975378 is a wasteful number, since it uses less digits than its factorization.

9726975378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540387529 (or 540387526 counting only the distinct ones).

The product of its digits is 40007520, while the sum is 63.

The square root of 9726975378 is about 98625.4296720678. The cubic root of 9726975378 is about 2134.6463683462.

The spelling of 9726975378 in words is "nine billion, seven hundred twenty-six million, nine hundred seventy-five thousand, three hundred seventy-eight".