64529986 has 8 divisors (see below), whose sum is σ = 96839820. Its totient is φ = 32250048.

The previous prime is 64529981. The next prime is 64529989. The reversal of 64529986 is 68992546.

It can be written as a sum of positive squares in 2 ways, for example, as 64304361 + 225625 = 8019^2 + 475^2 .

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

It is not an unprimeable number, because it can be changed into a prime (64529981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 931 + ... + 11398.

Almost surely, 2^64529986 is an apocalyptic number.

64529986 is a deficient number, since it is larger than the sum of its proper divisors (32309834).

64529986 is a wasteful number, since it uses less digits than its factorization.

64529986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14948.

The product of its digits is 933120, while the sum is 49.

The square root of 64529986 is about 8033.0558319982. The cubic root of 64529986 is about 401.1011036456.

The spelling of 64529986 in words is "sixty-four million, five hundred twenty-nine thousand, nine hundred eighty-six".