2221978859982 has 24 divisors (see below), whose sum is σ = 5502042891696. Its totient is φ = 634851102816.

The previous prime is 2221978859897. The next prime is 2221978859987. The reversal of 2221978859982 is 2899588791222.

2221978859982 is a `hidden beast` number, since 2 + 2 + 21 + 9 + 7 + 8 + 8 + 599 + 8 + 2 = 666.

It is a super-2 number, since 2×2221978859982² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2221978859982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221978859987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8817376303 + ... + 8817376554.

It is an arithmetic number, because the mean of its divisors is an integer number (229251787154).

Almost surely, 2^{2221978859982} is an apocalyptic number.

2221978859982 is an abundant number, since it is smaller than the sum of its proper divisors (3280064031714).

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

2221978859982 is a wasteful number, since it uses less digits than its factorization.

2221978859982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17634752872 (or 17634752869 counting only the distinct ones).

The product of its digits is 209018880, while the sum is 72.

The spelling of 2221978859982 in words is "two trillion, two hundred twenty-one billion, nine hundred seventy-eight million, eight hundred fifty-nine thousand, nine hundred eighty-two".