64071747653 has 4 divisors (see below), whose sum is σ = 64791655020. Its totient is φ = 63351840288.

The previous prime is 64071747643. The next prime is 64071747689. The reversal of 64071747653 is 35674717046.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4155478369 + 59916269284 = 64463^2 + 244778^2 .

It is a cyclic number.

It is not a de Polignac number, because 64071747653 - 2⁴ = 64071747637 is a prime.

It is a super-2 number, since 2×64071747653² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64071747643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359953550 + ... + 359953727.

It is an arithmetic number, because the mean of its divisors is an integer number (16197913755).

Almost surely, 2^64071747653 is an apocalyptic number.

It is an amenable number.

64071747653 is a deficient number, since it is larger than the sum of its proper divisors (719907367).

64071747653 is an equidigital number, since it uses as much as digits as its factorization.

64071747653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719907366.

The product of its (nonzero) digits is 2963520, while the sum is 50.

The spelling of 64071747653 in words is "sixty-four billion, seventy-one million, seven hundred forty-seven thousand, six hundred fifty-three".