64770647653 has 4 divisors (see below), whose sum is σ = 65682910368. Its totient is φ = 63858384940.

The previous prime is 64770647629. The next prime is 64770647657. The reversal of 64770647653 is 35674607746.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64770647653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64770647594 and 64770647603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64770647657) 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, 456131251 + ... + 456131392.

It is an arithmetic number, because the mean of its divisors is an integer number (16420727592).

Almost surely, 2^64770647653 is an apocalyptic number.

It is an amenable number.

64770647653 is a deficient number, since it is larger than the sum of its proper divisors (912262715).

64770647653 is an equidigital number, since it uses as much as digits as its factorization.

64770647653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912262714.

The product of its (nonzero) digits is 17781120, while the sum is 55.

The spelling of 64770647653 in words is "sixty-four billion, seven hundred seventy million, six hundred forty-seven thousand, six hundred fifty-three".