64641480 has 64 divisors (see below), whose sum is σ = 205338240. Its totient is φ = 16223232.

The previous prime is 64641457. The next prime is 64641481. The reversal of 64641480 is 8414646.

It is not an unprimeable number, because it can be changed into a prime (64641481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13804 + ... + 17883.

It is an arithmetic number, because the mean of its divisors is an integer number (3208410).

Almost surely, 2^64641480 is an apocalyptic number.

64641480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64641480 is an abundant number, since it is smaller than the sum of its proper divisors (140696760).

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

64641480 is a wasteful number, since it uses less digits than its factorization.

64641480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31718 (or 31714 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 64641480 is about 8039.9925373100. The cubic root of 64641480 is about 401.3319763410.

The spelling of 64641480 in words is "sixty-four million, six hundred forty-one thousand, four hundred eighty".