10891742449 has 8 divisors (see below), whose sum is σ = 12451919168.
Its totient is φ = 9332619120.
The previous prime is 10891742443. The next prime is 10891742467. The reversal of 10891742449 is 94424719801.
It is a happy number.
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 10891742449 - 23 = 10891742441 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (10891742441) 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, 241062 + ... + 282655.
It is an arithmetic number, because the mean of its divisors is an integer number (1556489896).
Almost surely, 210891742449 is an apocalyptic number.
It is an amenable number.
10891742449 is a deficient number, since it is larger than the sum of its proper divisors (1560176719).
10891742449 is an equidigital number, since it uses as much as digits as its factorization.
10891742449 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 526695.
The product of its (nonzero) digits is 580608, while the sum is 49.
The spelling of 10891742449 in words is "ten billion, eight hundred ninety-one million, seven hundred forty-two thousand, four hundred forty-nine".