64277616 has 80 divisors (see below), whose sum is σ = 179988480. Its totient is φ = 19649280.

The previous prime is 64277611. The next prime is 64277641. The reversal of 64277616 is 61677246.

64277616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64277616² = 8263223837286912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64277611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148921 + ... + 149351.

It is an arithmetic number, because the mean of its divisors is an integer number (2249856).

Almost surely, 2^64277616 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 64277616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89994240).

64277616 is an abundant number, since it is smaller than the sum of its proper divisors (115710864).

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

64277616 is a wasteful number, since it uses less digits than its factorization.

64277616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694 (or 688 counting only the distinct ones).

The product of its digits is 84672, while the sum is 39.

The square root of 64277616 is about 8017.3322246243. The cubic root of 64277616 is about 400.5775324061.

The spelling of 64277616 in words is "sixty-four million, two hundred seventy-seven thousand, six hundred sixteen".