4661581585 has 4 divisors (see below), whose sum is σ = 5593897908. Its totient is φ = 3729265264.

The previous prime is 4661581583. The next prime is 4661581601. The reversal of 4661581585 is 5851851664.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1855972561 + 2805609024 = 43081^2 + 52968^2 .

It is a cyclic number.

It is not a de Polignac number, because 4661581585 - 2¹ = 4661581583 is a prime.

It is a super-2 number, since 2×4661581585² = 43460685747222224450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4661581583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466158154 + ... + 466158163.

It is an arithmetic number, because the mean of its divisors is an integer number (1398474477).

Almost surely, 2^4661581585 is an apocalyptic number.

It is an amenable number.

4661581585 is a deficient number, since it is larger than the sum of its proper divisors (932316323).

4661581585 is an equidigital number, since it uses as much as digits as its factorization.

4661581585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932316322.

The product of its digits is 1152000, while the sum is 49.

The square root of 4661581585 is about 68275.7759750850. The cubic root of 4661581585 is about 1670.4921141642.

The spelling of 4661581585 in words is "four billion, six hundred sixty-one million, five hundred eighty-one thousand, five hundred eighty-five".