1977818240880 has 160 divisors (see below), whose sum is σ = 6905807315520. Its totient is φ = 520193249280.

The previous prime is 1977818240869. The next prime is 1977818240899. The reversal of 1977818240880 is 880428187791.

1977818240880 is a `hidden beast` number, since 1 + 9 + 7 + 78 + 1 + 82 + 408 + 80 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6113941 + ... + 6429300.

It is an arithmetic number, because the mean of its divisors is an integer number (43161295722).

Almost surely, 2^{1977818240880} is an apocalyptic number.

1977818240880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1977818240880 is an abundant number, since it is smaller than the sum of its proper divisors (4927989074640).

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

1977818240880 is a wasteful number, since it uses less digits than its factorization.

1977818240880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12543336 (or 12543324 counting only the distinct ones).

The product of its (nonzero) digits is 14450688, while the sum is 63.

The spelling of 1977818240880 in words is "one trillion, nine hundred seventy-seven billion, eight hundred eighteen million, two hundred forty thousand, eight hundred eighty".