65041581 has 8 divisors (see below), whose sum is σ = 94605984. Its totient is φ = 39419120.

The previous prime is 65041567. The next prime is 65041583. The reversal of 65041581 is 18514056.

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 65041581 - 2⁵ = 65041549 is a prime.

It is a super-2 number, since 2×65041581² = 8460814517959122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65041583) 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, 985446 + ... + 985511.

It is an arithmetic number, because the mean of its divisors is an integer number (11825748).

Almost surely, 2^65041581 is an apocalyptic number.

It is an amenable number.

65041581 is a deficient number, since it is larger than the sum of its proper divisors (29564403).

65041581 is a wasteful number, since it uses less digits than its factorization.

65041581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970971.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 65041581 is about 8064.8360801693. The cubic root of 65041581 is about 402.1582938899.

The spelling of 65041581 in words is "sixty-five million, forty-one thousand, five hundred eighty-one".