64450206826 has 4 divisors (see below), whose sum is σ = 96675310242. Its totient is φ = 32225103412.

The previous prime is 64450206823. The next prime is 64450206827. The reversal of 64450206826 is 62860205446.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62860205446 = 2 ⋅31430102723.

It can be written as a sum of positive squares in only one way, i.e., 63461167225 + 989039601 = 251915^2 + 31449^2 .

It is not an unprimeable number, because it can be changed into a prime (64450206823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16112551705 + ... + 16112551708.

Almost surely, 2^64450206826 is an apocalyptic number.

64450206826 is a deficient number, since it is larger than the sum of its proper divisors (32225103416).

64450206826 is a wasteful number, since it uses less digits than its factorization.

64450206826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32225103415.

The product of its (nonzero) digits is 552960, while the sum is 43.

The spelling of 64450206826 in words is "sixty-four billion, four hundred fifty million, two hundred six thousand, eight hundred twenty-six".