65639744106 has 96 divisors (see below), whose sum is σ = 150670808640. Its totient is φ = 18981361152.

The previous prime is 65639744077. The next prime is 65639744117. The reversal of 65639744106 is 60144793656.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1338325 + ... + 1386503.

It is an arithmetic number, because the mean of its divisors is an integer number (1569487590).

Almost surely, 2^65639744106 is an apocalyptic number.

65639744106 is an abundant number, since it is smaller than the sum of its proper divisors (85031064534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65639744106 is a wasteful number, since it uses less digits than its factorization.

65639744106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48276 (or 48257 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 51.

The spelling of 65639744106 in words is "sixty-five billion, six hundred thirty-nine million, seven hundred forty-four thousand, one hundred six".