65220120511747 has 4 divisors (see below), whose sum is σ = 65220138442296. Its totient is φ = 65220102581200.

The previous prime is 65220120511717. The next prime is 65220120511783. The reversal of 65220120511747 is 74711502102256.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65220120511747 - 2²³ = 65220112123139 is a prime.

It is a super-2 number, since 2×65220120511747² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65220120511717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1356973 + ... + 11501374.

It is an arithmetic number, because the mean of its divisors is an integer number (16305034610574).

Almost surely, 2^{65220120511747} is an apocalyptic number.

65220120511747 is a deficient number, since it is larger than the sum of its proper divisors (17930549).

65220120511747 is a wasteful number, since it uses less digits than its factorization.

65220120511747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17930548.

The product of its (nonzero) digits is 235200, while the sum is 43.

The spelling of 65220120511747 in words is "sixty-five trillion, two hundred twenty billion, one hundred twenty million, five hundred eleven thousand, seven hundred forty-seven".