1997186899630 has 32 divisors (see below), whose sum is σ = 3953841704064. Its totient is φ = 721733005056.

The previous prime is 1997186899607. The next prime is 1997186899711. The reversal of 1997186899630 is 369986817991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163429807 + ... + 163442026.

It is an arithmetic number, because the mean of its divisors is an integer number (123557553252).

Almost surely, 2^{1997186899630} is an apocalyptic number.

1997186899630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1997186899630 is a deficient number, since it is larger than the sum of its proper divisors (1956654804434).

1997186899630 is a wasteful number, since it uses less digits than its factorization.

1997186899630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326871900.

The product of its (nonzero) digits is 317447424, while the sum is 76.

The spelling of 1997186899630 in words is "one trillion, nine hundred ninety-seven billion, one hundred eighty-six million, eight hundred ninety-nine thousand, six hundred thirty".