1191913675650 has 288 divisors, whose sum is σ = 3361267990080. Its totient is φ = 313995813120.

The previous prime is 1191913675613. The next prime is 1191913675663. The reversal of 1191913675650 is 565763191911.

1191913675650 is a `hidden beast` number, since 1 + 1 + 9 + 1 + 9 + 13 + 67 + 565 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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 143 ways as a sum of consecutive naturals, for example, 525765817 + ... + 525768083.

It is an arithmetic number, because the mean of its divisors is an integer number (11671069410).

Almost surely, 2^{1191913675650} is an apocalyptic number.

1191913675650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1191913675650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1680633995040).

1191913675650 is an abundant number, since it is smaller than the sum of its proper divisors (2169354314430).

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

1191913675650 is a wasteful number, since it uses less digits than its factorization.

1191913675650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2800 (or 2783 counting only the distinct ones).

The product of its (nonzero) digits is 1530900, while the sum is 54.

The spelling of 1191913675650 in words is "one trillion, one hundred ninety-one billion, nine hundred thirteen million, six hundred seventy-five thousand, six hundred fifty".