65644663631011 has 8 divisors (see below), whose sum is σ = 69198218902800. Its totient is φ = 62100965656800.

The previous prime is 65644663630961. The next prime is 65644663631017. The reversal of 65644663631011 is 11013636644656.

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 65644663631011 - 2¹⁵ = 65644663598243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65644663631011.

It is not an unprimeable number, because it can be changed into a prime (65644663631017) 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, 2464310716 + ... + 2464337353.

It is an arithmetic number, because the mean of its divisors is an integer number (8649777362850).

Almost surely, 2^{65644663631011} is an apocalyptic number.

65644663631011 is a deficient number, since it is larger than the sum of its proper divisors (3553555271789).

65644663631011 is a wasteful number, since it uses less digits than its factorization.

65644663631011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4928648789.

The product of its (nonzero) digits is 5598720, while the sum is 52.

The spelling of 65644663631011 in words is "sixty-five trillion, six hundred forty-four billion, six hundred sixty-three million, six hundred thirty-one thousand, eleven".