1000019000091 has 8 divisors (see below), whose sum is σ = 1369395387664. Its totient is φ = 648660972960.

The previous prime is 1000019000081. The next prime is 1000019000117. The reversal of 1000019000091 is 1900009100001.

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

It is not a de Polignac number, because 1000019000091 - 2⁵ = 1000019000059 is a prime.

It is the 1000010-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000019000081) by changing a digit.

It is a nontrivial repunit in base 1000009.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4504589980 + ... + 4504590201.

It is an arithmetic number, because the mean of its divisors is an integer number (171174423458).

Almost surely, 2^{1000019000091} is an apocalyptic number.

1000019000091 is a deficient number, since it is larger than the sum of its proper divisors (369376387573).

1000019000091 is an equidigital number, since it uses as much as digits as its factorization.

1000019000091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9009180221.

The product of its (nonzero) digits is 81, while the sum is 21.

The spelling of 1000019000091 in words is "one trillion, nineteen million, ninety-one", and thus it is an aban number and an uban number.