64634560 has 112 divisors (see below), whose sum is σ = 162616896. Its totient is φ = 24440832.

The previous prime is 64634551. The next prime is 64634569. The reversal of 64634560 is 6543646.

It is an interprime number because it is at equal distance from previous prime (64634551) and next prime (64634569).

It is not an unprimeable number, because it can be changed into a prime (64634569) 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, 627469 + ... + 627571.

Almost surely, 2^64634560 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 64634560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81308448).

64634560 is an abundant number, since it is smaller than the sum of its proper divisors (97982336).

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

64634560 is a wasteful number, since it uses less digits than its factorization.

64634560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 64634560 is about 8039.5621771338. The cubic root of 64634560 is about 401.3176546991.

The spelling of 64634560 in words is "sixty-four million, six hundred thirty-four thousand, five hundred sixty".