1091649112 has 8 divisors (see below), whose sum is σ = 2046842100. Its totient is φ = 545824552.

The previous prime is 1091649089. The next prime is 1091649113. The reversal of 1091649112 is 2119461901.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091649113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68228062 + ... + 68228077.

Almost surely, 2^1091649112 is an apocalyptic number.

It is an amenable number.

1091649112 is a deficient number, since it is larger than the sum of its proper divisors (955192988).

1091649112 is a wasteful number, since it uses less digits than its factorization.

1091649112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136456145 (or 136456141 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 1091649112 is about 33040.1136801918. The cubic root of 1091649112 is about 1029.6612176419.

The spelling of 1091649112 in words is "one billion, ninety-one million, six hundred forty-nine thousand, one hundred twelve".