6440779325090 has 32 divisors (see below), whose sum is σ = 12743893166400. Its totient is φ = 2324222929600.

The previous prime is 6440779325087. The next prime is 6440779325147. The reversal of 6440779325090 is 905239770446.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223468565 + ... + 223497384.

It is an arithmetic number, because the mean of its divisors is an integer number (398246661450).

Almost surely, 2^{6440779325090} is an apocalyptic number.

6440779325090 is a deficient number, since it is larger than the sum of its proper divisors (6303113841310).

6440779325090 is a wasteful number, since it uses less digits than its factorization.

6440779325090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446966098.

The product of its (nonzero) digits is 11430720, while the sum is 56.

The spelling of 6440779325090 in words is "six trillion, four hundred forty billion, seven hundred seventy-nine million, three hundred twenty-five thousand, ninety".