64440148605 has 32 divisors (see below), whose sum is σ = 118556350464. Its totient is φ = 29277619776.

The previous prime is 64440148589. The next prime is 64440148657. The reversal of 64440148605 is 50684104446.

It is a happy number.

It is not a de Polignac number, because 64440148605 - 2⁴ = 64440148589 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 1865449 + ... + 1899678.

It is an arithmetic number, because the mean of its divisors is an integer number (3704885952).

Almost surely, 2^64440148605 is an apocalyptic number.

It is an amenable number.

64440148605 is a deficient number, since it is larger than the sum of its proper divisors (54116201859).

64440148605 is a wasteful number, since it uses less digits than its factorization.

64440148605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3765305.

The product of its (nonzero) digits is 368640, while the sum is 42.

The spelling of 64440148605 in words is "sixty-four billion, four hundred forty million, one hundred forty-eight thousand, six hundred five".