65621488412656 has 80 divisors (see below), whose sum is σ = 144903343672800. Its totient is φ = 28514256512000.

The previous prime is 65621488412639. The next prime is 65621488412657.

65621488412656 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65621488412657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63132391 + ... + 64163398.

It is an arithmetic number, because the mean of its divisors is an integer number (1811291795910).

Almost surely, 2^{65621488412656} is an apocalyptic number.

It is an amenable number.

65621488412656 is an abundant number, since it is smaller than the sum of its proper divisors (79281855260144).

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

65621488412656 is a wasteful number, since it uses less digits than its factorization.

65621488412656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127295938 (or 127295932 counting only the distinct ones).

The product of its digits is 132710400, while the sum is 64.

The spelling of 65621488412656 in words is "sixty-five trillion, six hundred twenty-one billion, four hundred eighty-eight million, four hundred twelve thousand, six hundred fifty-six".