7474505581 has 2 divisors, whose sum is σ = 7474505582. Its totient is φ = 7474505580.

The previous prime is 7474505561. The next prime is 7474505609. The reversal of 7474505581 is 1855054747.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7214973481 + 259532100 = 84941^2 + 16110^2 .

It is a cyclic number.

It is not a de Polignac number, because 7474505581 - 2⁷ = 7474505453 is a prime.

It is a super-3 number, since 3×7474505581³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7474505561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3737252790 + 3737252791.

It is an arithmetic number, because the mean of its divisors is an integer number (3737252791).

Almost surely, 2^7474505581 is an apocalyptic number.

It is an amenable number.

7474505581 is a deficient number, since it is larger than the sum of its proper divisors (1).

7474505581 is an equidigital number, since it uses as much as digits as its factorization.

7474505581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784000, while the sum is 46.

The square root of 7474505581 is about 86455.2229827672. Note that the first 3 decimals coincide. The cubic root of 7474505581 is about 1955.2133632470.

The spelling of 7474505581 in words is "seven billion, four hundred seventy-four million, five hundred five thousand, five hundred eighty-one".