65367576820 has 432 divisors, whose sum is σ = 185261298768. Its totient is φ = 19194900480.

The previous prime is 65367576787. The next prime is 65367576823. The reversal of 65367576820 is 2867576356.

It can be written as a sum of positive squares in 8 ways, for example, as 28891160676 + 36476416144 = 169974^2 + 190988^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65367576823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 280547424 + ... + 280547656.

It is an arithmetic number, because the mean of its divisors is an integer number (428845599).

Almost surely, 2^65367576820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65367576820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92630649384).

65367576820 is an abundant number, since it is smaller than the sum of its proper divisors (119893721948).

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

65367576820 is a wasteful number, since it uses less digits than its factorization.

65367576820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 55.

The spelling of 65367576820 in words is "sixty-five billion, three hundred sixty-seven million, five hundred seventy-six thousand, eight hundred twenty".