64509672 has 32 divisors (see below), whose sum is σ = 161700480. Its totient is φ = 21446400.

The previous prime is 64509661. The next prime is 64509673. The reversal of 64509672 is 27690546.

It is a super-2 number, since 2×64509672² = 8322995563095168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64509672.

It is not an unprimeable number, because it can be changed into a prime (64509673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6273 + ... + 12975.

It is an arithmetic number, because the mean of its divisors is an integer number (5053140).

Almost surely, 2^64509672 is an apocalyptic number.

It is an amenable number.

64509672 is an abundant number, since it is smaller than the sum of its proper divisors (97190808).

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

64509672 is a wasteful number, since it uses less digits than its factorization.

64509672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7113 (or 7109 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 64509672 is about 8031.7913319508. The cubic root of 64509672 is about 401.0590104346.

The spelling of 64509672 in words is "sixty-four million, five hundred nine thousand, six hundred seventy-two".