64529866205 has 36 divisors (see below), whose sum is σ = 91366753500. Its totient is φ = 43624990080.

The previous prime is 64529866151. The next prime is 64529866237. The reversal of 64529866205 is 50266892546.

It can be written as a sum of positive squares in 2 ways, for example, as 8092261849 + 56437604356 = 89957^2 + 237566^2 .

It is not a de Polignac number, because 64529866205 - 2¹² = 64529862109 is a prime.

It is a super-2 number, since 2×64529866205² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1208921 + ... + 1261169.

It is an arithmetic number, because the mean of its divisors is an integer number (2537965375).

Almost surely, 2^64529866205 is an apocalyptic number.

It is an amenable number.

64529866205 is a deficient number, since it is larger than the sum of its proper divisors (26836887295).

64529866205 is an equidigital number, since it uses as much as digits as its factorization.

64529866205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52410 (or 52332 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 53.

The spelling of 64529866205 in words is "sixty-four billion, five hundred twenty-nine million, eight hundred sixty-six thousand, two hundred five".