109161616 has 40 divisors (see below), whose sum is σ = 215220600. Its totient is φ = 53630976.

The previous prime is 109161601. The next prime is 109161617. The reversal of 109161616 is 616161901.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18835600 + 90326016 = 4340^2 + 9504^2 .

It is not an unprimeable number, because it can be changed into a prime (109161617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312610 + ... + 312958.

It is an arithmetic number, because the mean of its divisors is an integer number (5380515).

Almost surely, 2^109161616 is an apocalyptic number.

109161616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

109161616 is a deficient number, since it is larger than the sum of its proper divisors (106058984).

109161616 is a wasteful number, since it uses less digits than its factorization.

109161616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 109161616 is about 10448.0436446255. The cubic root of 109161616 is about 477.9215921531.

The spelling of 109161616 in words is "one hundred nine million, one hundred sixty-one thousand, six hundred sixteen".