64246320890 has 16 divisors (see below), whose sum is σ = 121729871520. Its totient is φ = 24345974160.

The previous prime is 64246320857. The next prime is 64246320893. The reversal of 64246320890 is 9802364246.

It is not an unprimeable number, because it can be changed into a prime (64246320893) 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, 169069076 + ... + 169069455.

It is an arithmetic number, because the mean of its divisors is an integer number (7608116970).

Almost surely, 2^64246320890 is an apocalyptic number.

64246320890 is a deficient number, since it is larger than the sum of its proper divisors (57483550630).

64246320890 is a wasteful number, since it uses less digits than its factorization.

64246320890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338138557.

The product of its (nonzero) digits is 497664, while the sum is 44.

The spelling of 64246320890 in words is "sixty-four billion, two hundred forty-six million, three hundred twenty thousand, eight hundred ninety".