1091919351087 has 6 divisors (see below), whose sum is σ = 1577216840472. Its totient is φ = 727946234052.

The previous prime is 1091919351073. The next prime is 1091919351167. The reversal of 1091919351087 is 7801539191901.

1091919351087 is a `hidden beast` number, since 109 + 1 + 9 + 19 + 3 + 510 + 8 + 7 = 666.

It is not a de Polignac number, because 1091919351087 - 2⁸ = 1091919350831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091919351067) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60662186163 + ... + 60662186180.

It is an arithmetic number, because the mean of its divisors is an integer number (262869473412).

Almost surely, 2^{1091919351087} is an apocalyptic number.

1091919351087 is a deficient number, since it is larger than the sum of its proper divisors (485297489385).

1091919351087 is a wasteful number, since it uses less digits than its factorization.

1091919351087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121324372349 (or 121324372346 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 54.

The spelling of 1091919351087 in words is "one trillion, ninety-one billion, nine hundred nineteen million, three hundred fifty-one thousand, eighty-seven".