64536505226 has 4 divisors (see below), whose sum is σ = 96804757842. Its totient is φ = 32268252612.

The previous prime is 64536505171. The next prime is 64536505279. The reversal of 64536505226 is 62250563546.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62250563546 = 2 ⋅31125281773.

It can be written as a sum of positive squares in only one way, i.e., 36061630201 + 28474875025 = 189899^2 + 168745^2 .

It is a super-2 number, since 2×64536505226² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 16134126305 + ... + 16134126308.

Almost surely, 2^64536505226 is an apocalyptic number.

64536505226 is a deficient number, since it is larger than the sum of its proper divisors (32268252616).

64536505226 is a wasteful number, since it uses less digits than its factorization.

64536505226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32268252615.

The product of its (nonzero) digits is 1296000, while the sum is 44.

The spelling of 64536505226 in words is "sixty-four billion, five hundred thirty-six million, five hundred five thousand, two hundred twenty-six".