1974220888866 has 16 divisors (see below), whose sum is σ = 3950389725984. Its totient is φ = 657748971584.

The previous prime is 1974220888847. The next prime is 1974220888879. The reversal of 1974220888866 is 6688880224791.

It is a self number, because there is not a number n which added to its sum of digits gives 1974220888866.

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, 81151335 + ... + 81175658.

It is an arithmetic number, because the mean of its divisors is an integer number (246899357874).

Almost surely, 2^{1974220888866} is an apocalyptic number.

1974220888866 is an abundant number, since it is smaller than the sum of its proper divisors (1976168837118).

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

1974220888866 is a wasteful number, since it uses less digits than its factorization.

1974220888866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162329025.

The product of its (nonzero) digits is 148635648, while the sum is 69.

The spelling of 1974220888866 in words is "one trillion, nine hundred seventy-four billion, two hundred twenty million, eight hundred eighty-eight thousand, eight hundred sixty-six".