64816136 has 64 divisors (see below), whose sum is σ = 155105280. Its totient is φ = 24655680.

The previous prime is 64816069. The next prime is 64816153. The reversal of 64816136 is 63161846.

It is a super-2 number, since 2×64816136² = 8402262971940992, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 64816096 and 64816105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25265 + ... + 27711.

It is an arithmetic number, because the mean of its divisors is an integer number (2423520).

Almost surely, 2^64816136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64816136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77552640).

64816136 is an abundant number, since it is smaller than the sum of its proper divisors (90289144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64816136 is a wasteful number, since it uses less digits than its factorization.

64816136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514 (or 2510 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 64816136 is about 8050.8469119714. The cubic root of 64816136 is about 401.6931066962.

The spelling of 64816136 in words is "sixty-four million, eight hundred sixteen thousand, one hundred thirty-six".