91164616 has 8 divisors (see below), whose sum is σ = 170933670. Its totient is φ = 45582304.

The previous prime is 91164613. The next prime is 91164629. The reversal of 91164616 is 61646119.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 56942116 + 34222500 = 7546^2 + 5850^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (91164613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5697781 + ... + 5697796.

Almost surely, 2^91164616 is an apocalyptic number.

It is an amenable number.

91164616 is a deficient number, since it is larger than the sum of its proper divisors (79769054).

91164616 is a wasteful number, since it uses less digits than its factorization.

91164616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11395583 (or 11395579 counting only the distinct ones).

The product of its digits is 7776, while the sum is 34.

The square root of 91164616 is about 9548.0163384862. The cubic root of 91164616 is about 450.0652020748.

The spelling of 91164616 in words is "ninety-one million, one hundred sixty-four thousand, six hundred sixteen".