1493840555566 has 4 divisors (see below), whose sum is σ = 2240760833352. Its totient is φ = 746920277782.

The previous prime is 1493840555561. The next prime is 1493840555587. The reversal of 1493840555566 is 6655550483941.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1493840555561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 373460138890 + ... + 373460138893.

It is an arithmetic number, because the mean of its divisors is an integer number (560190208338).

Almost surely, 2^{1493840555566} is an apocalyptic number.

1493840555566 is a deficient number, since it is larger than the sum of its proper divisors (746920277786).

1493840555566 is an equidigital number, since it uses as much as digits as its factorization.

1493840555566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746920277785.

The product of its (nonzero) digits is 77760000, while the sum is 61.

The spelling of 1493840555566 in words is "one trillion, four hundred ninety-three billion, eight hundred forty million, five hundred fifty-five thousand, five hundred sixty-six".