1191141426436 has 24 divisors (see below), whose sum is σ = 2245464448920. Its totient is φ = 549605501952.

The previous prime is 1191141426401. The next prime is 1191141426463. The reversal of 1191141426436 is 6346241411911.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14662788100 + 1176478638336 = 121090^2 + 1084656^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1191141426392 and 1191141426401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2978431 + ... + 3354598.

It is an arithmetic number, because the mean of its divisors is an integer number (93561018705).

Almost surely, 2^{1191141426436} is an apocalyptic number.

It is an amenable number.

1191141426436 is a deficient number, since it is larger than the sum of its proper divisors (1054323022484).

1191141426436 is a wasteful number, since it uses less digits than its factorization.

1191141426436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6336663 (or 6336661 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The spelling of 1191141426436 in words is "one trillion, one hundred ninety-one billion, one hundred forty-one million, four hundred twenty-six thousand, four hundred thirty-six".