4046661581 has 8 divisors (see below), whose sum is σ = 4075025760. Its totient is φ = 4018390288.

The previous prime is 4046661571. The next prime is 4046661599. The reversal of 4046661581 is 1851666404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4046661581 - 2⁶ = 4046661517 is a prime.

It is a super-2 number, since 2×4046661581² = 32750939902282839122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4046661551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65390 + ... + 111216.

It is an arithmetic number, because the mean of its divisors is an integer number (509378220).

Almost surely, 2^4046661581 is an apocalyptic number.

It is an amenable number.

4046661581 is a deficient number, since it is larger than the sum of its proper divisors (28364179).

4046661581 is a wasteful number, since it uses less digits than its factorization.

4046661581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46443.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 4046661581 is about 63613.3758025779. The cubic root of 4046661581 is about 1593.5497581236.

The spelling of 4046661581 in words is "four billion, forty-six million, six hundred sixty-one thousand, five hundred eighty-one".