11891044451099 has 16 divisors (see below), whose sum is σ = 13079684244480. Its totient is φ = 10720582200000.

The previous prime is 11891044451089. The next prime is 11891044451131. The reversal of 11891044451099 is 99015444019811.

It is a cyclic number.

It is not a de Polignac number, because 11891044451099 - 2¹² = 11891044447003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11891044451089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4957619 + ... + 6954140.

It is an arithmetic number, because the mean of its divisors is an integer number (817480265280).

Almost surely, 2^{11891044451099} is an apocalyptic number.

11891044451099 is a deficient number, since it is larger than the sum of its proper divisors (1188639793381).

11891044451099 is a wasteful number, since it uses less digits than its factorization.

11891044451099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11912522.

The product of its (nonzero) digits is 1866240, while the sum is 56.

The spelling of 11891044451099 in words is "eleven trillion, eight hundred ninety-one billion, forty-four million, four hundred fifty-one thousand, ninety-nine".