65402272420 has 48 divisors (see below), whose sum is σ = 141853284720. Its totient is φ = 25315670016.

The previous prime is 65402272391. The next prime is 65402272451. The reversal of 65402272420 is 2427220456.

It can be written as a sum of positive squares in 8 ways, for example, as 133263936 + 65269008484 = 11544^2 + 255478^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345225 + ... + 499984.

It is an arithmetic number, because the mean of its divisors is an integer number (2955276765).

Almost surely, 2^65402272420 is an apocalyptic number.

It is an amenable number.

65402272420 is an abundant number, since it is smaller than the sum of its proper divisors (76451012300).

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

65402272420 is a wasteful number, since it uses less digits than its factorization.

65402272420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845344 (or 845342 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 34.

Adding to 65402272420 its reverse (2427220456), we get a palindrome (67829492876).

The spelling of 65402272420 in words is "sixty-five billion, four hundred two million, two hundred seventy-two thousand, four hundred twenty".