7181358641 has 2 divisors, whose sum is σ = 7181358642. Its totient is φ = 7181358640.

The previous prime is 7181358629. The next prime is 7181358659. The reversal of 7181358641 is 1468531817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6869094400 + 312264241 = 82880^2 + 17671^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7181358641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7181358592 and 7181358601.

It is not a weakly prime, because it can be changed into another prime (7181258641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3590679320 + 3590679321.

It is an arithmetic number, because the mean of its divisors is an integer number (3590679321).

Almost surely, 2^7181358641 is an apocalyptic number.

It is an amenable number.

7181358641 is a deficient number, since it is larger than the sum of its proper divisors (1).

7181358641 is an equidigital number, since it uses as much as digits as its factorization.

7181358641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 44.

The square root of 7181358641 is about 84742.8972893894. The cubic root of 7181358641 is about 1929.3108442688.

The spelling of 7181358641 in words is "seven billion, one hundred eighty-one million, three hundred fifty-eight thousand, six hundred forty-one".