1091136961388 has 6 divisors (see below), whose sum is σ = 1909489682436. Its totient is φ = 545568480692.

The previous prime is 1091136961381. The next prime is 1091136961391. The reversal of 1091136961388 is 8831696311901.

It is not an unprimeable number, because it can be changed into a prime (1091136961381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136392120170 + ... + 136392120177.

It is an arithmetic number, because the mean of its divisors is an integer number (318248280406).

Almost surely, 2^{1091136961388} is an apocalyptic number.

It is an amenable number.

1091136961388 is a deficient number, since it is larger than the sum of its proper divisors (818352721048).

1091136961388 is a wasteful number, since it uses less digits than its factorization.

1091136961388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272784240351 (or 272784240349 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 56.

The spelling of 1091136961388 in words is "one trillion, ninety-one billion, one hundred thirty-six million, nine hundred sixty-one thousand, three hundred eighty-eight".