1091016900 has 54 divisors (see below), whose sum is σ = 3419734682. Its totient is φ = 290937600.

The previous prime is 1091016793. The next prime is 1091016959. The reversal of 1091016900 is 96101901.

It can be written as a sum of positive squares in 3 ways, for example, as 296115264 + 794901636 = 17208^2 + 28194^2 .

It is a super-2 number, since 2×1091016900² = 2380635752171220000, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 605221 + ... + 607020.

Almost surely, 2^1091016900 is an apocalyptic number.

1091016900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1091016900 is an abundant number, since it is smaller than the sum of its proper divisors (2328717782).

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

1091016900 is a wasteful number, since it uses less digits than its factorization.

1091016900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212261 (or 1212251 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The square root of 1091016900 is about 33030.5449546325. The cubic root of 1091016900 is about 1029.4624083736.

The spelling of 1091016900 in words is "one billion, ninety-one million, sixteen thousand, nine hundred".