65387667808 has 48 divisors (see below), whose sum is σ = 129413985120. Its totient is φ = 32521015296.

The previous prime is 65387667803. The next prime is 65387667809. The reversal of 65387667808 is 80876678356.

It is a self number, because there is not a number n which added to its sum of digits gives 65387667808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65387667803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5787541 + ... + 5798827.

It is an arithmetic number, because the mean of its divisors is an integer number (2696124690).

Almost surely, 2^65387667808 is an apocalyptic number.

It is an amenable number.

65387667808 is a deficient number, since it is larger than the sum of its proper divisors (64026317312).

65387667808 is a wasteful number, since it uses less digits than its factorization.

65387667808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12239 (or 12231 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 64.

The spelling of 65387667808 in words is "sixty-five billion, three hundred eighty-seven million, six hundred sixty-seven thousand, eight hundred eight".