91518368 has 12 divisors (see below), whose sum is σ = 180176850. Its totient is φ = 45759168.

The previous prime is 91518367. The next prime is 91518377. The reversal of 91518368 is 86381519.

It can be written as a sum of positive squares in only one way, i.e., 90859024 + 659344 = 9532^2 + 812^2 .

It is a super-2 number, since 2×91518368² = 16751223362766848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91518367) by changing a digit.

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 as a sum of consecutive naturals, namely, 1429943 + ... + 1430006.

Almost surely, 2^91518368 is an apocalyptic number.

It is an amenable number.

91518368 is a deficient number, since it is larger than the sum of its proper divisors (88658482).

91518368 is a wasteful number, since it uses less digits than its factorization.

91518368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2859959 (or 2859951 counting only the distinct ones).

The product of its digits is 51840, while the sum is 41.

The square root of 91518368 is about 9566.5232974158. The cubic root of 91518368 is about 450.6465898334.

The spelling of 91518368 in words is "ninety-one million, five hundred eighteen thousand, three hundred sixty-eight".