91432828055 has 16 divisors (see below), whose sum is σ = 112736206944. Its totient is φ = 71136858240.

The previous prime is 91432828013. The next prime is 91432828093. The reversal of 91432828055 is 55082823419.

It is a happy number.

It is not a de Polignac number, because 91432828055 - 2¹² = 91432823959 is a prime.

It is a super-2 number, since 2×91432828055² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297740 + ... + 521070.

It is an arithmetic number, because the mean of its divisors is an integer number (7046012934).

Almost surely, 2^91432828055 is an apocalyptic number.

91432828055 is a deficient number, since it is larger than the sum of its proper divisors (21303378889).

91432828055 is a wasteful number, since it uses less digits than its factorization.

91432828055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225586.

The product of its (nonzero) digits is 691200, while the sum is 47.

The spelling of 91432828055 in words is "ninety-one billion, four hundred thirty-two million, eight hundred twenty-eight thousand, fifty-five".