65139721006 has 8 divisors (see below), whose sum is σ = 97789088520. Its totient is φ = 32543358168.

The previous prime is 65139721001. The next prime is 65139721007. The reversal of 65139721006 is 60012793156.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 65139721006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65139721001) 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 3 ways as a sum of consecutive naturals, for example, 13248096 + ... + 13253011.

It is an arithmetic number, because the mean of its divisors is an integer number (12223636065).

Almost surely, 2^65139721006 is an apocalyptic number.

65139721006 is a deficient number, since it is larger than the sum of its proper divisors (32649367514).

65139721006 is a wasteful number, since it uses less digits than its factorization.

65139721006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26502338.

The product of its (nonzero) digits is 68040, while the sum is 40.

The spelling of 65139721006 in words is "sixty-five billion, one hundred thirty-nine million, seven hundred twenty-one thousand, six".