65049681 has 8 divisors (see below), whose sum is σ = 90504000. Its totient is φ = 41480912.

The previous prime is 65049679. The next prime is 65049707. The reversal of 65049681 is 18694056.

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 65049681 - 2¹ = 65049679 is a prime.

It is a super-2 number, since 2×65049681² = 8462921996403522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65049181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471306 + ... + 471443.

It is an arithmetic number, because the mean of its divisors is an integer number (11313000).

Almost surely, 2^65049681 is an apocalyptic number.

It is an amenable number.

65049681 is a deficient number, since it is larger than the sum of its proper divisors (25454319).

65049681 is a wasteful number, since it uses less digits than its factorization.

65049681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942775.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 65049681 is about 8065.3382446119. The cubic root of 65049681 is about 402.1749875542.

The spelling of 65049681 in words is "sixty-five million, forty-nine thousand, six hundred eighty-one".