1191351168 has 192 divisors, whose sum is σ = 3947130720. Its totient is φ = 337858560.

The previous prime is 1191351131. The next prime is 1191351181. The reversal of 1191351168 is 8611531911.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1265578 + ... + 1266518.

Almost surely, 2^1191351168 is an apocalyptic number.

1191351168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1191351168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1973565360).

1191351168 is an abundant number, since it is smaller than the sum of its proper divisors (2755779552).

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

1191351168 is a wasteful number, since it uses less digits than its factorization.

1191351168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125 (or 1110 counting only the distinct ones).

The product of its digits is 6480, while the sum is 36.

The square root of 1191351168 is about 34515.9552670935. The cubic root of 1191351168 is about 1060.0994234498.

The spelling of 1191351168 in words is "one billion, one hundred ninety-one million, three hundred fifty-one thousand, one hundred sixty-eight".