91000000000019 has 8 divisors (see below), whose sum is σ = 99273055270080. Its totient is φ = 82726999396200.

The previous prime is 91000000000003. The next prime is 91000000000037.

91000000000019 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91000000000019 - 2⁴ = 91000000000003 is a prime.

It is a super-2 number, since 2×91000000000019² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91000000000019.

It is not an unprimeable number, because it can be changed into a prime (91000000000219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10146509 + ... + 16880510.

It is an arithmetic number, because the mean of its divisors is an integer number (12409131908760).

Almost surely, 2^{91000000000019} is an apocalyptic number.

91000000000019 is a deficient number, since it is larger than the sum of its proper divisors (8273055270061).

91000000000019 is a wasteful number, since it uses less digits than its factorization.

91000000000019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27333121.

The product of its (nonzero) digits is 81, while the sum is 20.

It can be divided in two parts, 910000000000 and 19, that added together give a palindrome (910000000019).

The spelling of 91000000000019 in words is "ninety-one trillion, nineteen", and thus it is an aban number and an uban number.