109561664 has 14 divisors (see below), whose sum is σ = 217411554. Its totient is φ = 54780800.

The previous prime is 109561649. The next prime is 109561709. The reversal of 109561664 is 466165901.

It can be written as a sum of positive squares in only one way, i.e., 77299264 + 32262400 = 8792^2 + 5680^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 855887 + ... + 856014.

Almost surely, 2^109561664 is an apocalyptic number.

It is an amenable number.

109561664 is a deficient number, since it is larger than the sum of its proper divisors (107849890).

109561664 is an equidigital number, since it uses as much as digits as its factorization.

109561664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1711913 (or 1711903 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 109561664 is about 10467.1707734230. The cubic root of 109561664 is about 478.5046985086.

The spelling of 109561664 in words is "one hundred nine million, five hundred sixty-one thousand, six hundred sixty-four".