64520516 has 6 divisors (see below), whose sum is σ = 112910910. Its totient is φ = 32260256.

The previous prime is 64520509. The next prime is 64520537. The reversal of 64520516 is 61502546.

It can be written as a sum of positive squares in only one way, i.e., 63266116 + 1254400 = 7954^2 + 1120^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8065061 + ... + 8065068.

It is an arithmetic number, because the mean of its divisors is an integer number (18818485).

Almost surely, 2^64520516 is an apocalyptic number.

It is an amenable number.

64520516 is a deficient number, since it is larger than the sum of its proper divisors (48390394).

64520516 is a wasteful number, since it uses less digits than its factorization.

64520516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16130133 (or 16130131 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 64520516 is about 8032.4663709224. The cubic root of 64520516 is about 401.0814816915.

The spelling of 64520516 in words is "sixty-four million, five hundred twenty thousand, five hundred sixteen".