1191681073930 has 16 divisors (see below), whose sum is σ = 2151792582120. Its totient is φ = 475168729792.

The previous prime is 1191681073909. The next prime is 1191681073931. The reversal of 1191681073930 is 393701861911.

It can be written as a sum of positive squares in 4 ways, for example, as 942353621001 + 249327452929 = 970749^2 + 499327^2 .

It is not an unprimeable number, because it can be changed into a prime (1191681073931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187959145 + ... + 187965484.

Almost surely, 2^{1191681073930} is an apocalyptic number.

1191681073930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1191681073930 is a deficient number, since it is larger than the sum of its proper divisors (960111508190).

1191681073930 is a wasteful number, since it uses less digits than its factorization.

1191681073930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375924953.

The product of its (nonzero) digits is 244944, while the sum is 49.

The spelling of 1191681073930 in words is "one trillion, one hundred ninety-one billion, six hundred eighty-one million, seventy-three thousand, nine hundred thirty".