52819947865 has 32 divisors (see below), whose sum is σ = 65144378880. Its totient is φ = 41102290944.

The previous prime is 52819947847. The next prime is 52819947889. The reversal of 52819947865 is 56874991825.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 52819947865 - 2¹³ = 52819939673 is a prime.

It is a super-2 number, since 2×52819947865² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 52819947797 and 52819947806.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8694469 + ... + 8700541.

It is an arithmetic number, because the mean of its divisors is an integer number (2035761840).

Almost surely, 2^52819947865 is an apocalyptic number.

It is an amenable number.

52819947865 is a deficient number, since it is larger than the sum of its proper divisors (12324431015).

52819947865 is a wasteful number, since it uses less digits than its factorization.

52819947865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6481.

The product of its digits is 43545600, while the sum is 64.

The spelling of 52819947865 in words is "fifty-two billion, eight hundred nineteen million, nine hundred forty-seven thousand, eight hundred sixty-five".