65651006150561 has 4 divisors (see below), whose sum is σ = 70701083546772. Its totient is φ = 60600928754352.

The previous prime is 65651006150557. The next prime is 65651006150593. The reversal of 65651006150561 is 16505160015656.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18877990904161 + 46773015246400 = 4344881^2 + 6839080^2 .

It is a cyclic number.

It is not a de Polignac number, because 65651006150561 - 2² = 65651006150557 is a prime.

It is a super-2 number, since 2×65651006150561² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65651006150551) 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, 2525038698086 + ... + 2525038698111.

It is an arithmetic number, because the mean of its divisors is an integer number (17675270886693).

Almost surely, 2^{65651006150561} is an apocalyptic number.

It is an amenable number.

65651006150561 is a deficient number, since it is larger than the sum of its proper divisors (5050077396211).

65651006150561 is a wasteful number, since it uses less digits than its factorization.

65651006150561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050077396210.

The product of its (nonzero) digits is 810000, while the sum is 47.

The spelling of 65651006150561 in words is "sixty-five trillion, six hundred fifty-one billion, six million, one hundred fifty thousand, five hundred sixty-one".