45709581 has 8 divisors (see below), whose sum is σ = 61142080. Its totient is φ = 30375072.

The previous prime is 45709567. The next prime is 45709591. The reversal of 45709581 is 18590754.

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

It is not a de Polignac number, because 45709581 - 2⁷ = 45709453 is a prime.

It is a super-2 number, since 2×45709581² = 4178731590391122, 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 (45709501) 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, 23401 + ... + 25278.

It is an arithmetic number, because the mean of its divisors is an integer number (7642760).

Almost surely, 2^45709581 is an apocalyptic number.

It is an amenable number.

45709581 is a deficient number, since it is larger than the sum of its proper divisors (15432499).

45709581 is a wasteful number, since it uses less digits than its factorization.

45709581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48995.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 45709581 is about 6760.8861105627. The cubic root of 45709581 is about 357.5491473990.

The spelling of 45709581 in words is "forty-five million, seven hundred nine thousand, five hundred eighty-one".