65644992001 has 32 divisors (see below), whose sum is σ = 74129184000. Its totient is φ = 57818914560.

The previous prime is 65644991983. The next prime is 65644992103. The reversal of 65644992001 is 10029944656.

It is a cyclic number.

It is not a de Polignac number, because 65644992001 - 2²⁵ = 65611437569 is a prime.

It is a super-2 number, since 2×65644992001² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65644999001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25044471 + ... + 25047091.

It is an arithmetic number, because the mean of its divisors is an integer number (2316537000).

Almost surely, 2^65644992001 is an apocalyptic number.

It is an amenable number.

65644992001 is a deficient number, since it is larger than the sum of its proper divisors (8484191999).

65644992001 is a wasteful number, since it uses less digits than its factorization.

65644992001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4249.

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 65644992001 in words is "sixty-five billion, six hundred forty-four million, nine hundred ninety-two thousand, one".