91115644 has 6 divisors (see below), whose sum is σ = 159452384. Its totient is φ = 45557820.

The previous prime is 91115623. The next prime is 91115669. The reversal of 91115644 is 44651119.

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, 11389452 + ... + 11389459.

Almost surely, 2^91115644 is an apocalyptic number.

It is an amenable number.

91115644 is a deficient number, since it is larger than the sum of its proper divisors (68336740).

91115644 is a wasteful number, since it uses less digits than its factorization.

91115644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22778915 (or 22778913 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 91115644 is about 9545.4514822506. The cubic root of 91115644 is about 449.9845986498.

The spelling of 91115644 in words is "ninety-one million, one hundred fifteen thousand, six hundred forty-four".