64711770653 has 4 divisors (see below), whose sum is σ = 64717011420. Its totient is φ = 64706529888.

The previous prime is 64711770647. The next prime is 64711770677. The reversal of 64711770653 is 35607711746.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35607711746 = 2 ⋅17803855873.

It can be written as a sum of positive squares in 2 ways, for example, as 2385150244 + 62326620409 = 48838^2 + 249653^2 .

It is a cyclic number.

It is not a de Polignac number, because 64711770653 - 2²⁴ = 64694993437 is a prime.

It is a super-2 number, since 2×64711770653² (a number of 22 digits) contains 22 as substring.

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 = 64711770598 and 64711770607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64711776653) 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 3 ways as a sum of consecutive naturals, for example, 2601818 + ... + 2626571.

It is an arithmetic number, because the mean of its divisors is an integer number (16179252855).

Almost surely, 2^64711770653 is an apocalyptic number.

It is an amenable number.

64711770653 is a deficient number, since it is larger than the sum of its proper divisors (5240767).

64711770653 is a wasteful number, since it uses less digits than its factorization.

64711770653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5240766.

The product of its (nonzero) digits is 740880, while the sum is 47.

The spelling of 64711770653 in words is "sixty-four billion, seven hundred eleven million, seven hundred seventy thousand, six hundred fifty-three".