65293000821 has 6 divisors (see below), whose sum is σ = 94312112310. Its totient is φ = 43528667208.

The previous prime is 65293000793. The next prime is 65293000831. The reversal of 65293000821 is 12800039256.

It can be written as a sum of positive squares in only one way, i.e., 34165455921 + 31127544900 = 184839^2 + 176430^2 .

It is not a de Polignac number, because 65293000821 - 2⁶ = 65293000757 is a prime.

It is a super-2 number, since 2×65293000821² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65293000831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3627388926 + ... + 3627388943.

It is an arithmetic number, because the mean of its divisors is an integer number (15718685385).

Almost surely, 2^65293000821 is an apocalyptic number.

It is an amenable number.

65293000821 is a deficient number, since it is larger than the sum of its proper divisors (29019111489).

65293000821 is a wasteful number, since it uses less digits than its factorization.

65293000821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7254777875 (or 7254777872 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 65293000821 in words is "sixty-five billion, two hundred ninety-three million, eight hundred twenty-one", and thus it is an aban number.