64441002438 has 32 divisors (see below), whose sum is σ = 143533000800. Its totient is φ = 21430718208.

The previous prime is 64441002391. The next prime is 64441002443. The reversal of 64441002438 is 83420014446.

64441002438 is a `hidden beast` number, since 644 + 4 + 1 + 0 + 0 + 2 + 4 + 3 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1354623 + ... + 1401386.

It is an arithmetic number, because the mean of its divisors is an integer number (4485406275).

Almost surely, 2^64441002438 is an apocalyptic number.

64441002438 is an abundant number, since it is smaller than the sum of its proper divisors (79091998362).

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

64441002438 is a wasteful number, since it uses less digits than its factorization.

64441002438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2756453 (or 2756447 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 36.

The spelling of 64441002438 in words is "sixty-four billion, four hundred forty-one million, two thousand, four hundred thirty-eight".