65615501608 has 32 divisors (see below), whose sum is σ = 131509344960. Its totient is φ = 30615925120.

The previous prime is 65615501561. The next prime is 65615501617. The reversal of 65615501608 is 80610551656.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4341310 + ... + 4356397.

It is an arithmetic number, because the mean of its divisors is an integer number (4109667030).

Almost surely, 2^65615501608 is an apocalyptic number.

It is an amenable number.

65615501608 is an abundant number, since it is smaller than the sum of its proper divisors (65893843352).

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

65615501608 is a wasteful number, since it uses less digits than its factorization.

65615501608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8697777 (or 8697773 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 43.

The spelling of 65615501608 in words is "sixty-five billion, six hundred fifteen million, five hundred one thousand, six hundred eight".