91127988816575 has 24 divisors (see below), whose sum is σ = 115757074354320. Its totient is φ = 71122869382400.

The previous prime is 91127988816563. The next prime is 91127988816587. The reversal of 91127988816575 is 57561888972119.

It is an interprime number because it is at equal distance from previous prime (91127988816563) and next prime (91127988816587).

It is not a de Polignac number, because 91127988816575 - 2¹² = 91127988812479 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91127988816496 and 91127988816505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52233716 + ... + 53950134.

It is an arithmetic number, because the mean of its divisors is an integer number (4823211431430).

Almost surely, 2^{91127988816575} is an apocalyptic number.

91127988816575 is a deficient number, since it is larger than the sum of its proper divisors (24629085537745).

91127988816575 is a wasteful number, since it uses less digits than its factorization.

91127988816575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768267 (or 1768262 counting only the distinct ones).

The product of its digits is 609638400, while the sum is 77.

The spelling of 91127988816575 in words is "ninety-one trillion, one hundred twenty-seven billion, nine hundred eighty-eight million, eight hundred sixteen thousand, five hundred seventy-five".