1191445199643 has 8 divisors (see below), whose sum is σ = 1589293738000. Its totient is φ = 793946730528.

The previous prime is 1191445199639. The next prime is 1191445199701. The reversal of 1191445199643 is 3469915441911.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1191445199643 - 2² = 1191445199639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1191445399643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87509368 + ... + 87522981.

It is an arithmetic number, because the mean of its divisors is an integer number (198661717250).

Almost surely, 2^{1191445199643} is an apocalyptic number.

1191445199643 is a deficient number, since it is larger than the sum of its proper divisors (397848538357).

1191445199643 is a wasteful number, since it uses less digits than its factorization.

1191445199643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175034621.

The product of its digits is 4199040, while the sum is 57.

The spelling of 1191445199643 in words is "one trillion, one hundred ninety-one billion, four hundred forty-five million, one hundred ninety-nine thousand, six hundred forty-three".