65531328873 has 8 divisors (see below), whose sum is σ = 88605740736. Its totient is φ = 43072234800.

The previous prime is 65531328869. The next prime is 65531328881. The reversal of 65531328873 is 37882313556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65531328873 - 2² = 65531328869 is a prime.

It is a super-2 number, since 2×65531328873² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (65531328883) 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, 153829198 + ... + 153829623.

It is an arithmetic number, because the mean of its divisors is an integer number (11075717592).

Almost surely, 2^65531328873 is an apocalyptic number.

It is an amenable number.

65531328873 is a deficient number, since it is larger than the sum of its proper divisors (23074411863).

65531328873 is a wasteful number, since it uses less digits than its factorization.

65531328873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307658895.

The product of its digits is 3628800, while the sum is 51.

The spelling of 65531328873 in words is "sixty-five billion, five hundred thirty-one million, three hundred twenty-eight thousand, eight hundred seventy-three".