64441378541 has 8 divisors (see below), whose sum is σ = 67248567360. Its totient is φ = 61634638912.

The previous prime is 64441378513. The next prime is 64441378613. The reversal of 64441378541 is 14587314446.

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

It is a cyclic number.

It is not a de Polignac number, because 64441378541 - 2¹⁴ = 64441362157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64441378511) 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, 199301 + ... + 410613.

It is an arithmetic number, because the mean of its divisors is an integer number (8406070920).

Almost surely, 2^64441378541 is an apocalyptic number.

It is an amenable number.

64441378541 is a deficient number, since it is larger than the sum of its proper divisors (2807188819).

64441378541 is a wasteful number, since it uses less digits than its factorization.

64441378541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224595.

The product of its digits is 1290240, while the sum is 47.

The spelling of 64441378541 in words is "sixty-four billion, four hundred forty-one million, three hundred seventy-eight thousand, five hundred forty-one".