65117649 has 4 divisors (see below), whose sum is σ = 86823536. Its totient is φ = 43411764.

The previous prime is 65117641. The next prime is 65117659. The reversal of 65117649 is 94671156.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 65117649 - 2³ = 65117641 is a prime.

It is a super-2 number, since 2×65117649² = 8480616422574402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65117641) 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, 10852939 + ... + 10852944.

It is an arithmetic number, because the mean of its divisors is an integer number (21705884).

Almost surely, 2^65117649 is an apocalyptic number.

It is an amenable number.

65117649 is a deficient number, since it is larger than the sum of its proper divisors (21705887).

65117649 is a wasteful number, since it uses less digits than its factorization.

65117649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21705886.

The product of its digits is 45360, while the sum is 39.

The square root of 65117649 is about 8069.5507309887. The cubic root of 65117649 is about 402.3150113750.

The spelling of 65117649 in words is "sixty-five million, one hundred seventeen thousand, six hundred forty-nine".