64444507 has 8 divisors (see below), whose sum is σ = 65024960. Its totient is φ = 63866880.

The previous prime is 64444489. The next prime is 64444511. The reversal of 64444507 is 70544446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64444507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64444517) 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, 83419 + ... + 84187.

It is an arithmetic number, because the mean of its divisors is an integer number (8128120).

Almost surely, 2^64444507 is an apocalyptic number.

64444507 is a deficient number, since it is larger than the sum of its proper divisors (580453).

64444507 is a wasteful number, since it uses less digits than its factorization.

64444507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413.

The product of its (nonzero) digits is 53760, while the sum is 34.

The square root of 64444507 is about 8027.7336154110. The cubic root of 64444507 is about 400.9239205340.

The spelling of 64444507 in words is "sixty-four million, four hundred forty-four thousand, five hundred seven".