65506325231621 has 8 divisors (see below), whose sum is σ = 68736294636480. Its totient is φ = 62308178185792.

The previous prime is 65506325231617. The next prime is 65506325231629. The reversal of 65506325231621 is 12613252360556.

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 65506325231621 - 2² = 65506325231617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65506325231629) 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, 7955585540 + ... + 7955593773.

It is an arithmetic number, because the mean of its divisors is an integer number (8592036829560).

Almost surely, 2^{65506325231621} is an apocalyptic number.

It is an amenable number.

65506325231621 is a deficient number, since it is larger than the sum of its proper divisors (3229969404859).

65506325231621 is a wasteful number, since it uses less digits than its factorization.

65506325231621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15911179515.

The product of its (nonzero) digits is 1944000, while the sum is 47.

The spelling of 65506325231621 in words is "sixty-five trillion, five hundred six billion, three hundred twenty-five million, two hundred thirty-one thousand, six hundred twenty-one".