64405650442 has 32 divisors (see below), whose sum is σ = 115662758400. Its totient is φ = 26313251328.

The previous prime is 64405650409. The next prime is 64405650487. The reversal of 64405650442 is 24405650446.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 64405650395 and 64405650404.

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, 971943 + ... + 1036090.

It is an arithmetic number, because the mean of its divisors is an integer number (3614461200).

Almost surely, 2^64405650442 is an apocalyptic number.

64405650442 is a deficient number, since it is larger than the sum of its proper divisors (51257107958).

64405650442 is a wasteful number, since it uses less digits than its factorization.

64405650442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008150.

The product of its (nonzero) digits is 460800, while the sum is 40.

The spelling of 64405650442 in words is "sixty-four billion, four hundred five million, six hundred fifty thousand, four hundred forty-two".