65217050551 has 8 divisors (see below), whose sum is σ = 68872487040. Its totient is φ = 61629940152.

The previous prime is 65217050543. The next prime is 65217050567. The reversal of 65217050551 is 15505071256.

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 65217050551 - 2³ = 65217050543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65217050551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65217050351) 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, 17079561 + ... + 17083378.

It is an arithmetic number, because the mean of its divisors is an integer number (8609060880).

Almost surely, 2^65217050551 is an apocalyptic number.

65217050551 is a deficient number, since it is larger than the sum of its proper divisors (3655436489).

65217050551 is a wasteful number, since it uses less digits than its factorization.

65217050551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34163045.

The product of its (nonzero) digits is 52500, while the sum is 37.

The spelling of 65217050551 in words is "sixty-five billion, two hundred seventeen million, fifty thousand, five hundred fifty-one".