65244627720 has 48 divisors (see below), whose sum is σ = 212045041260. Its totient is φ = 17398567296.

The previous prime is 65244627719. The next prime is 65244627731. The reversal of 65244627720 is 2772644256.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 56462313924 + 8782313796 = 237618^2 + 93714^2 .

It is a super-2 number, since 2×65244627720² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90617179 + ... + 90617898.

Almost surely, 2^65244627720 is an apocalyptic number.

65244627720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65244627720 is an abundant number, since it is smaller than the sum of its proper divisors (146800413540).

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

65244627720 is a wasteful number, since it uses less digits than its factorization.

65244627720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181235094 (or 181235087 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 45.

The spelling of 65244627720 in words is "sixty-five billion, two hundred forty-four million, six hundred twenty-seven thousand, seven hundred twenty".