64744576 has 96 divisors (see below), whose sum is σ = 145034820. Its totient is φ = 28753920.

The previous prime is 64744567. The next prime is 64744577. The reversal of 64744576 is 67544746.

It can be written as a sum of positive squares in 6 ways, for example, as 1382976 + 63361600 = 1176^2 + 7960^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64744577) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 886876 + ... + 886948.

Almost surely, 2^64744576 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 64744576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72517410).

64744576 is an abundant number, since it is smaller than the sum of its proper divisors (80290244).

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

64744576 is a wasteful number, since it uses less digits than its factorization.

64744576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 129 counting only the distinct ones).

The product of its digits is 564480, while the sum is 43.

The square root of 64744576 is about 8046.4014316960. The cubic root of 64744576 is about 401.5452230279.

The spelling of 64744576 in words is "sixty-four million, seven hundred forty-four thousand, five hundred seventy-six".