7409408681 has 2 divisors, whose sum is σ = 7409408682. Its totient is φ = 7409408680.

The previous prime is 7409408653. The next prime is 7409408723. The reversal of 7409408681 is 1868049047.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6484275625 + 925133056 = 80525^2 + 30416^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7409408681 is a prime.

It is a super-2 number, since 2×7409408681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7409408641) 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 as a sum of consecutive naturals, namely, 3704704340 + 3704704341.

It is an arithmetic number, because the mean of its divisors is an integer number (3704704341).

Almost surely, 2^7409408681 is an apocalyptic number.

It is an amenable number.

7409408681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7409408681 is an equidigital number, since it uses as much as digits as its factorization.

7409408681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 7409408681 is about 86077.9221461578. The cubic root of 7409408681 is about 1949.5206957857.

The spelling of 7409408681 in words is "seven billion, four hundred nine million, four hundred eight thousand, six hundred eighty-one".