64434224777 has 4 divisors (see below), whose sum is σ = 69390703620. Its totient is φ = 59477745936.

The previous prime is 64434224773. The next prime is 64434224807. The reversal of 64434224777 is 77742243446.

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 4417064521 + 60017160256 = 66461^2 + 244984^2 .

It is a cyclic number.

It is not a de Polignac number, because 64434224777 - 2² = 64434224773 is a prime.

It is a super-2 number, since 2×64434224777² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64434224773) 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, 2478239402 + ... + 2478239427.

It is an arithmetic number, because the mean of its divisors is an integer number (17347675905).

Almost surely, 2^64434224777 is an apocalyptic number.

It is an amenable number.

64434224777 is a deficient number, since it is larger than the sum of its proper divisors (4956478843).

64434224777 is a wasteful number, since it uses less digits than its factorization.

64434224777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4956478842.

The product of its digits is 6322176, while the sum is 50.

The spelling of 64434224777 in words is "sixty-four billion, four hundred thirty-four million, two hundred twenty-four thousand, seven hundred seventy-seven".