1097121664 has 32 divisors (see below), whose sum is σ = 2213359200. Its totient is φ = 541612032.

The previous prime is 1097121659. The next prime is 1097121671. The reversal of 1097121664 is 4661217901.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44137 + ... + 64360.

It is an arithmetic number, because the mean of its divisors is an integer number (69167475).

Almost surely, 2^1097121664 is an apocalyptic number.

It is an amenable number.

1097121664 is an abundant number, since it is smaller than the sum of its proper divisors (1116237536).

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

1097121664 is an equidigital number, since it uses as much as digits as its factorization.

1097121664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108590 (or 108578 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 1097121664 is about 33122.8269324948. The cubic root of 1097121664 is about 1031.3789504915.

The spelling of 1097121664 in words is "one billion, ninety-seven million, one hundred twenty-one thousand, six hundred sixty-four".