65819116836 has 192 divisors, whose sum is σ = 204474009600. Its totient is φ = 18073756800.

The previous prime is 65819116829. The next prime is 65819116843. The reversal of 65819116836 is 63861191856.

It is an interprime number because it is at equal distance from previous prime (65819116829) and next prime (65819116843).

It is a super-2 number, since 2×65819116836² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 455766 + ... + 582546.

It is an arithmetic number, because the mean of its divisors is an integer number (1064968800).

Almost surely, 2^65819116836 is an apocalyptic number.

65819116836 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65819116836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102237004800).

65819116836 is an abundant number, since it is smaller than the sum of its proper divisors (138654892764).

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

65819116836 is a wasteful number, since it uses less digits than its factorization.

65819116836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126847 (or 126839 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The spelling of 65819116836 in words is "sixty-five billion, eight hundred nineteen million, one hundred sixteen thousand, eight hundred thirty-six".