64615408 has 80 divisors (see below), whose sum is σ = 151990272. Its totient is φ = 26208000.

The previous prime is 64615387. The next prime is 64615423. The reversal of 64615408 is 80451646.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70473 + ... + 71383.

Almost surely, 2^64615408 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 64615408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75995136).

64615408 is an abundant number, since it is smaller than the sum of its proper divisors (87374864).

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

64615408 is a wasteful number, since it uses less digits than its factorization.

64615408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974 (or 968 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 64615408 is about 8038.3709792470. The cubic root of 64615408 is about 401.2780123623.

The spelling of 64615408 in words is "sixty-four million, six hundred fifteen thousand, four hundred eight".