65319917986 has 16 divisors (see below), whose sum is σ = 99745279200. Its totient is φ = 32072655328.

The previous prime is 65319917977. The next prime is 65319917987. The reversal of 65319917986 is 68971991356.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (65319917987) 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, 177976 + ... + 402883.

It is an arithmetic number, because the mean of its divisors is an integer number (6234079950).

Almost surely, 2^65319917986 is an apocalyptic number.

65319917986 is a deficient number, since it is larger than the sum of its proper divisors (34425361214).

65319917986 is a wasteful number, since it uses less digits than its factorization.

65319917986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581873.

The product of its digits is 22044960, while the sum is 64.

The spelling of 65319917986 in words is "sixty-five billion, three hundred nineteen million, nine hundred seventeen thousand, nine hundred eighty-six".