1780143666612 has 12 divisors (see below), whose sum is σ = 4153668555456. Its totient is φ = 593381222200.

The previous prime is 1780143666589. The next prime is 1780143666641. The reversal of 1780143666612 is 2166663410871.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1780143666612² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74172652764 + ... + 74172652787.

It is an arithmetic number, because the mean of its divisors is an integer number (346139046288).

Almost surely, 2^{1780143666612} is an apocalyptic number.

1780143666612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1780143666612 is an abundant number, since it is smaller than the sum of its proper divisors (2373524888844).

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

1780143666612 is a wasteful number, since it uses less digits than its factorization.

1780143666612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148345305558 (or 148345305556 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 1780143666612 in words is "one trillion, seven hundred eighty billion, one hundred forty-three million, six hundred sixty-six thousand, six hundred twelve".