64523986 has 8 divisors (see below), whose sum is σ = 97492860. Its totient is φ = 32026368.

The previous prime is 64523969. The next prime is 64523999. The reversal of 64523986 is 68932546.

It can be written as a sum of positive squares in 2 ways, for example, as 60543961 + 3980025 = 7781^2 + 1995^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117471 + ... + 118018.

Almost surely, 2^64523986 is an apocalyptic number.

64523986 is a deficient number, since it is larger than the sum of its proper divisors (32968874).

64523986 is a wasteful number, since it uses less digits than its factorization.

64523986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235628.

The product of its digits is 311040, while the sum is 43.

The square root of 64523986 is about 8032.6823664328. The cubic root of 64523986 is about 401.0886717962.

The spelling of 64523986 in words is "sixty-four million, five hundred twenty-three thousand, nine hundred eighty-six".