7221779105840 has 40 divisors (see below), whose sum is σ = 18082223840688. Its totient is φ = 2666503054080.

The previous prime is 7221779105833. The next prime is 7221779105899. The reversal of 7221779105840 is 485019771227.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3472008146 + ... + 3472010225.

Almost surely, 2^{7221779105840} is an apocalyptic number.

It is an amenable number.

7221779105840 is an abundant number, since it is smaller than the sum of its proper divisors (10860444734848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7221779105840 is a wasteful number, since it uses less digits than its factorization.

7221779105840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6944018397 (or 6944018391 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 53.

The spelling of 7221779105840 in words is "seven trillion, two hundred twenty-one billion, seven hundred seventy-nine million, one hundred five thousand, eight hundred forty".