1993155766 has 16 divisors (see below), whose sum is σ = 3417649056. Its totient is φ = 854006976.

The previous prime is 1993155721. The next prime is 1993155779. The reversal of 1993155766 is 6675513991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54700 + ... + 83536.

It is an arithmetic number, because the mean of its divisors is an integer number (213603066).

Almost surely, 2^1993155766 is an apocalyptic number.

1993155766 is a deficient number, since it is larger than the sum of its proper divisors (1424493290).

1993155766 is a wasteful number, since it uses less digits than its factorization.

1993155766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33783.

The product of its digits is 1530900, while the sum is 52.

The square root of 1993155766 is about 44644.7731095142. The cubic root of 1993155766 is about 1258.4822082686.

The spelling of 1993155766 in words is "one billion, nine hundred ninety-three million, one hundred fifty-five thousand, seven hundred sixty-six".