9251940681 has 6 divisors (see below), whose sum is σ = 13363914330. Its totient is φ = 6167960448.

The previous prime is 9251940671. The next prime is 9251940703. The reversal of 9251940681 is 1860491529.

9251940681 is a `hidden beast` number, since 92 + 519 + 40 + 6 + 8 + 1 = 666.

9251940681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8738510400 + 513430281 = 93480^2 + 22659^2 .

It is not a de Polignac number, because 9251940681 - 2¹⁵ = 9251907913 is a prime.

It is a super-2 number, since 2×9251940681² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9251940611) 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, 513996696 + ... + 513996713.

It is an arithmetic number, because the mean of its divisors is an integer number (2227319055).

Almost surely, 2^9251940681 is an apocalyptic number.

It is an amenable number.

9251940681 is a deficient number, since it is larger than the sum of its proper divisors (4111973649).

9251940681 is a wasteful number, since it uses less digits than its factorization.

9251940681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027993415 (or 1027993412 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 9251940681 is about 96187.0088993311. The cubic root of 9251940681 is about 2099.3150208151.

The spelling of 9251940681 in words is "nine billion, two hundred fifty-one million, nine hundred forty thousand, six hundred eighty-one".