65520656656231 has 4 divisors (see below), whose sum is σ = 74880750464272. Its totient is φ = 56160562848192.

The previous prime is 65520656656211. The next prime is 65520656656277. The reversal of 65520656656231 is 13265665602556.

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 65520656656231 - 2¹³ = 65520656648039 is a prime.

It is a super-2 number, since 2×65520656656231² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65520656656211) 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, 4680046904010 + ... + 4680046904023.

It is an arithmetic number, because the mean of its divisors is an integer number (18720187616068).

Almost surely, 2^{65520656656231} is an apocalyptic number.

65520656656231 is a deficient number, since it is larger than the sum of its proper divisors (9360093808041).

65520656656231 is an equidigital number, since it uses as much as digits as its factorization.

65520656656231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9360093808040.

The product of its (nonzero) digits is 58320000, while the sum is 58.

The spelling of 65520656656231 in words is "sixty-five trillion, five hundred twenty billion, six hundred fifty-six million, six hundred fifty-six thousand, two hundred thirty-one".