64815104 has 68 divisors (see below), whose sum is σ = 138410976. Its totient is φ = 30277632.

The previous prime is 64815103. The next prime is 64815181. The reversal of 64815104 is 40151846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64815103) 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, 1507307 + ... + 1507349.

Almost surely, 2^64815104 is an apocalyptic number.

64815104 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64815104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69205488).

64815104 is an abundant number, since it is smaller than the sum of its proper divisors (73595872).

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

64815104 is an frugal number, since it uses more digits than its factorization.

64815104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 64815104 is about 8050.7828190804. The cubic root of 64815104 is about 401.6909747709.

The spelling of 64815104 in words is "sixty-four million, eight hundred fifteen thousand, one hundred four".