65248273664 has 72 divisors (see below), whose sum is σ = 150886935360. Its totient is φ = 27580428288.

The previous prime is 65248273661. The next prime is 65248273687. The reversal of 65248273664 is 46637284256.

It is a super-3 number, since 3×65248273664³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65248273661) 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, 118574 + ... + 380205.

It is an arithmetic number, because the mean of its divisors is an integer number (2095651880).

Almost surely, 2^65248273664 is an apocalyptic number.

65248273664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

65248273664 is an abundant number, since it is smaller than the sum of its proper divisors (85638661696).

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

65248273664 is an equidigital number, since it uses as much as digits as its factorization.

65248273664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498875 (or 498861 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 53.

The spelling of 65248273664 in words is "sixty-five billion, two hundred forty-eight million, two hundred seventy-three thousand, six hundred sixty-four".