65107985616 has 60 divisors (see below), whose sum is σ = 182287023360. Its totient is φ = 21693718080.

The previous prime is 65107985597. The next prime is 65107985617. The reversal of 65107985616 is 61658970156.

65107985616 is a `hidden beast` number, since 6 + 5 + 1 + 0 + 79 + 8 + 561 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65107985617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 262161 + ... + 446031.

It is an arithmetic number, because the mean of its divisors is an integer number (3038117056).

Almost surely, 2^65107985616 is an apocalyptic number.

It is an amenable number.

65107985616 is an abundant number, since it is smaller than the sum of its proper divisors (117179037744).

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

65107985616 is a wasteful number, since it uses less digits than its factorization.

65107985616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186344 (or 186335 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The spelling of 65107985616 in words is "sixty-five billion, one hundred seven million, nine hundred eighty-five thousand, six hundred sixteen".