91032544655 has 16 divisors (see below), whose sum is σ = 117649076160. Its totient is φ = 67220022528.

The previous prime is 91032544649. The next prime is 91032544657. The reversal of 91032544655 is 55644523019.

It is a Cunningham number, because it is equal to 301716²-1.

It is a cyclic number.

It is not a de Polignac number, because 91032544655 - 2¹⁰ = 91032543631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91032544657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1478414 + ... + 1538756.

It is an arithmetic number, because the mean of its divisors is an integer number (7353067260).

Almost surely, 2^91032544655 is an apocalyptic number.

91032544655 is a deficient number, since it is larger than the sum of its proper divisors (26616531505).

91032544655 is a wasteful number, since it uses less digits than its factorization.

91032544655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83570.

The product of its (nonzero) digits is 648000, while the sum is 44.

The spelling of 91032544655 in words is "ninety-one billion, thirty-two million, five hundred forty-four thousand, six hundred fifty-five".