91145926893 has 96 divisors (see below), whose sum is σ = 151355337600. Its totient is φ = 48502831104.

The previous prime is 91145926877. The next prime is 91145926909. The reversal of 91145926893 is 39862954119.

It is an interprime number because it is at equal distance from previous prime (91145926877) and next prime (91145926909).

It is not a de Polignac number, because 91145926893 - 2⁴ = 91145926877 is a prime.

It is a super-3 number, since 3×91145926893³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91145922893) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 83390055 + ... + 83391147.

It is an arithmetic number, because the mean of its divisors is an integer number (1576618100).

Almost surely, 2^91145926893 is an apocalyptic number.

It is an amenable number.

91145926893 is a deficient number, since it is larger than the sum of its proper divisors (60209410707).

91145926893 is a wasteful number, since it uses less digits than its factorization.

91145926893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611 (or 1604 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 57.

The spelling of 91145926893 in words is "ninety-one billion, one hundred forty-five million, nine hundred twenty-six thousand, eight hundred ninety-three".