64905529 has 8 divisors (see below), whose sum is σ = 70591752. Its totient is φ = 59318400.

The previous prime is 64905523. The next prime is 64905551. The reversal of 64905529 is 92550946.

It can be written as a sum of positive squares in 4 ways, for example, as 19316025 + 45589504 = 4395^2 + 6752^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64905529 - 2³ = 64905521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64905491 and 64905500.

It is not an unprimeable number, because it can be changed into a prime (64905521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23404 + ... + 26029.

It is an arithmetic number, because the mean of its divisors is an integer number (8823969).

Almost surely, 2^64905529 is an apocalyptic number.

It is an amenable number.

64905529 is a deficient number, since it is larger than the sum of its proper divisors (5686223).

64905529 is a wasteful number, since it uses less digits than its factorization.

64905529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49547.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 64905529 is about 8056.3967752340. The cubic root of 64905529 is about 401.8776906524.

The spelling of 64905529 in words is "sixty-four million, nine hundred five thousand, five hundred twenty-nine".