64487840344 has 32 divisors (see below), whose sum is σ = 121226649840. Its totient is φ = 32160844800.

The previous prime is 64487840317. The next prime is 64487840363. The reversal of 64487840344 is 44304878446.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 64487840291 and 64487840300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5262064 + ... + 5274304.

Almost surely, 2^64487840344 is an apocalyptic number.

It is an amenable number.

64487840344 is a deficient number, since it is larger than the sum of its proper divisors (56738809496).

64487840344 is a wasteful number, since it uses less digits than its factorization.

64487840344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13891 (or 13887 counting only the distinct ones).

The product of its (nonzero) digits is 8257536, while the sum is 52.

The spelling of 64487840344 in words is "sixty-four billion, four hundred eighty-seven million, eight hundred forty thousand, three hundred forty-four".