65428564628 has 24 divisors (see below), whose sum is σ = 130863153792. Its totient is φ = 28039522464.

The previous prime is 65428564613. The next prime is 65428564637. The reversal of 65428564628 is 82646582456.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 806825 + ... + 884207.

It is an arithmetic number, because the mean of its divisors is an integer number (5452631408).

Almost surely, 2^65428564628 is an apocalyptic number.

It is an amenable number.

65428564628 is an abundant number, since it is smaller than the sum of its proper divisors (65434589164).

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

65428564628 is a wasteful number, since it uses less digits than its factorization.

65428564628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107591 (or 107589 counting only the distinct ones).

The product of its digits is 22118400, while the sum is 56.

The spelling of 65428564628 in words is "sixty-five billion, four hundred twenty-eight million, five hundred sixty-four thousand, six hundred twenty-eight".