65350852721 has 16 divisors (see below), whose sum is σ = 83013683328. Its totient is φ = 49961932800.

The previous prime is 65350852709. The next prime is 65350852727. The reversal of 65350852721 is 12725805356.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65350852721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65350852727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8002640 + ... + 8010801.

It is an arithmetic number, because the mean of its divisors is an integer number (5188355208).

Almost surely, 2^65350852721 is an apocalyptic number.

It is an amenable number.

65350852721 is a deficient number, since it is larger than the sum of its proper divisors (17662830607).

65350852721 is a wasteful number, since it uses less digits than its factorization.

65350852721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16013512.

The product of its (nonzero) digits is 504000, while the sum is 44.

The spelling of 65350852721 in words is "sixty-five billion, three hundred fifty million, eight hundred fifty-two thousand, seven hundred twenty-one".