64646026 has 8 divisors (see below), whose sum is σ = 98297604. Its totient is φ = 31880160.

The previous prime is 64645979. The next prime is 64646027. The reversal of 64646026 is 62064646.

It can be written as a sum of positive squares in 2 ways, for example, as 57078025 + 7568001 = 7555^2 + 2751^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 64645982 and 64646000.

It is not an unprimeable number, because it can be changed into a prime (64646027) 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, 221245 + ... + 221536.

Almost surely, 2^64646026 is an apocalyptic number.

64646026 is a deficient number, since it is larger than the sum of its proper divisors (33651578).

64646026 is a wasteful number, since it uses less digits than its factorization.

64646026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442856.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 64646026 is about 8040.2752440448. The cubic root of 64646026 is about 401.3413841929.

The spelling of 64646026 in words is "sixty-four million, six hundred forty-six thousand, twenty-six".