64241944867 has 4 divisors (see below), whose sum is σ = 67623099880. Its totient is φ = 60860789856.

The previous prime is 64241944853. The next prime is 64241944873. The reversal of 64241944867 is 76844914246.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64241944867 - 2³⁵ = 29882206499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64241944367) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1690577478 + ... + 1690577515.

It is an arithmetic number, because the mean of its divisors is an integer number (16905774970).

Almost surely, 2^64241944867 is an apocalyptic number.

64241944867 is a deficient number, since it is larger than the sum of its proper divisors (3381155013).

64241944867 is a wasteful number, since it uses less digits than its factorization.

64241944867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3381155012.

The product of its digits is 9289728, while the sum is 55.

The spelling of 64241944867 in words is "sixty-four billion, two hundred forty-one million, nine hundred forty-four thousand, eight hundred sixty-seven".