7478556180461 has 2 divisors, whose sum is σ = 7478556180462. Its totient is φ = 7478556180460.

The previous prime is 7478556180449. The next prime is 7478556180493. The reversal of 7478556180461 is 1640816558747.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6363460308100 + 1115095872361 = 2522590^2 + 1055981^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7478556180461 is a prime.

It is a super-2 number, since 2×7478556180461² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7478556180394 and 7478556180403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7478556180401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3739278090230 + 3739278090231.

It is an arithmetic number, because the mean of its divisors is an integer number (3739278090231).

Almost surely, 2^{7478556180461} is an apocalyptic number.

It is an amenable number.

7478556180461 is a deficient number, since it is larger than the sum of its proper divisors (1).

7478556180461 is an equidigital number, since it uses as much as digits as its factorization.

7478556180461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45158400, while the sum is 62.

The spelling of 7478556180461 in words is "seven trillion, four hundred seventy-eight billion, five hundred fifty-six million, one hundred eighty thousand, four hundred sixty-one".