64935786365 has 4 divisors (see below), whose sum is σ = 77922943644. Its totient is φ = 51948629088.

The previous prime is 64935786317. The next prime is 64935786367. The reversal of 64935786365 is 56368753946.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56368753946 = 2 ⋅28184376973.

It can be written as a sum of positive squares in 2 ways, for example, as 9701856004 + 55233930361 = 98498^2 + 235019^2 .

It is a cyclic number.

It is not a de Polignac number, because 64935786365 - 2²⁰ = 64934737789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64935786298 and 64935786307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64935786367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6493578632 + ... + 6493578641.

It is an arithmetic number, because the mean of its divisors is an integer number (19480735911).

Almost surely, 2^64935786365 is an apocalyptic number.

It is an amenable number.

64935786365 is a deficient number, since it is larger than the sum of its proper divisors (12987157279).

64935786365 is a wasteful number, since it uses less digits than its factorization.

64935786365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12987157278.

The product of its digits is 97977600, while the sum is 62.

The spelling of 64935786365 in words is "sixty-four billion, nine hundred thirty-five million, seven hundred eighty-six thousand, three hundred sixty-five".