1977163219444 has 24 divisors (see below), whose sum is σ = 4162448884160. Its totient is φ = 802757998656.

The previous prime is 1977163219439. The next prime is 1977163219457. The reversal of 1977163219444 is 4449123617791.

It is a congruent number.

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, 1858235577 + ... + 1858236640.

Almost surely, 2^{1977163219444} is an apocalyptic number.

1977163219444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1977163219444 is an abundant number, since it is smaller than the sum of its proper divisors (2185285664716).

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

1977163219444 is a wasteful number, since it uses less digits than its factorization.

1977163219444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3716472247 (or 3716472245 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 58.

The spelling of 1977163219444 in words is "one trillion, nine hundred seventy-seven billion, one hundred sixty-three million, two hundred nineteen thousand, four hundred forty-four".