65220120511947 has 20 divisors (see below), whose sum is σ = 97454553710800. Its totient is φ = 43468045803504.

The previous prime is 65220120511841. The next prime is 65220120511981. The reversal of 65220120511947 is 74911502102256.

65220120511947 is a `hidden beast` number, since 6 + 5 + 2 + 2 + 0 + 120 + 511 + 9 + 4 + 7 = 666.

It is not a de Polignac number, because 65220120511947 - 2¹⁸ = 65220120249803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65220120510947) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 111136447 + ... + 111721752.

It is an arithmetic number, because the mean of its divisors is an integer number (4872727685540).

Almost surely, 2^{65220120511947} is an apocalyptic number.

65220120511947 is a deficient number, since it is larger than the sum of its proper divisors (32234433198853).

65220120511947 is a wasteful number, since it uses less digits than its factorization.

65220120511947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222861824 (or 222861815 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 65220120511947 in words is "sixty-five trillion, two hundred twenty billion, one hundred twenty million, five hundred eleven thousand, nine hundred forty-seven".