91055378175 has 48 divisors (see below), whose sum is σ = 158539138560. Its totient is φ = 45986365440.

The previous prime is 91055378171. The next prime is 91055378177. The reversal of 91055378175 is 57187355019.

It is a happy number.

It is not a de Polignac number, because 91055378175 - 2² = 91055378171 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91055378171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3473919 + ... + 3500031.

It is an arithmetic number, because the mean of its divisors is an integer number (3302898720).

Almost surely, 2^91055378175 is an apocalyptic number.

91055378175 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

91055378175 is a deficient number, since it is larger than the sum of its proper divisors (67483760385).

91055378175 is a wasteful number, since it uses less digits than its factorization.

91055378175 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28592 (or 28587 counting only the distinct ones).

The product of its (nonzero) digits is 1323000, while the sum is 51.

The spelling of 91055378175 in words is "ninety-one billion, fifty-five million, three hundred seventy-eight thousand, one hundred seventy-five".