65639744119 has 8 divisors (see below), whose sum is σ = 67225094640. Its totient is φ = 64070822400.

The previous prime is 65639744117. The next prime is 65639744189. The reversal of 65639744119 is 91144793656.

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 65639744119 - 2¹ = 65639744117 is a prime.

It is a super-2 number, since 2×65639744119² (a number of 22 digits) contains 22 as substring.

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 65639744119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65639744117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4099114 + ... + 4115095.

It is an arithmetic number, because the mean of its divisors is an integer number (8403136830).

Almost surely, 2^65639744119 is an apocalyptic number.

65639744119 is a deficient number, since it is larger than the sum of its proper divisors (1585350521).

65639744119 is a wasteful number, since it uses less digits than its factorization.

65639744119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8214401.

The product of its digits is 4898880, while the sum is 55.

The spelling of 65639744119 in words is "sixty-five billion, six hundred thirty-nine million, seven hundred forty-four thousand, one hundred nineteen".