1091896164 has 36 divisors (see below), whose sum is σ = 2785402620. Its totient is φ = 360624960.

The previous prime is 1091896109. The next prime is 1091896171. The reversal of 1091896164 is 4616981901.

1091896164 is a `hidden beast` number, since 10 + 9 + 18 + 9 + 616 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 692216100 + 399680064 = 26310^2 + 19992^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135207 + ... + 143054.

It is an arithmetic number, because the mean of its divisors is an integer number (77372295).

Almost surely, 2^1091896164 is an apocalyptic number.

It is an amenable number.

1091896164 is an abundant number, since it is smaller than the sum of its proper divisors (1693506456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1091896164 is a wasteful number, since it uses less digits than its factorization.

1091896164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278380 (or 278375 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 1091896164 is about 33043.8521362144. The cubic root of 1091896164 is about 1029.7388862728.

The spelling of 1091896164 in words is "one billion, ninety-one million, eight hundred ninety-six thousand, one hundred sixty-four".