7746307981 has 16 divisors (see below), whose sum is σ = 7987215600. Its totient is φ = 7508039680.

The previous prime is 7746307969. The next prime is 7746307991. The reversal of 7746307981 is 1897036477.

It can be written as a sum of positive squares in 8 ways, for example, as 1579347081 + 6166960900 = 39741^2 + 78530^2 .

It is a cyclic number.

It is not a de Polignac number, because 7746307981 - 2¹¹ = 7746305933 is a prime.

It is a super-2 number, since 2×7746307981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7746307951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7383945 + ... + 7384993.

It is an arithmetic number, because the mean of its divisors is an integer number (499200975).

Almost surely, 2^7746307981 is an apocalyptic number.

It is an amenable number.

7746307981 is a deficient number, since it is larger than the sum of its proper divisors (240907619).

7746307981 is a wasteful number, since it uses less digits than its factorization.

7746307981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2096.

The product of its (nonzero) digits is 1778112, while the sum is 52.

The square root of 7746307981 is about 88013.1125514829. The cubic root of 7746307981 is about 1978.6315052258.

The spelling of 7746307981 in words is "seven billion, seven hundred forty-six million, three hundred seven thousand, nine hundred eighty-one".