10891742389 has 4 divisors (see below), whose sum is σ = 11881900800. Its totient is φ = 9901583980.

The previous prime is 10891742363. The next prime is 10891742441. The reversal of 10891742389 is 98324719801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10891742389 - 2⁵ = 10891742357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10891742489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 495079189 + ... + 495079210.

It is an arithmetic number, because the mean of its divisors is an integer number (2970475200).

Almost surely, 2^10891742389 is an apocalyptic number.

It is an amenable number.

10891742389 is a deficient number, since it is larger than the sum of its proper divisors (990158411).

10891742389 is an equidigital number, since it uses as much as digits as its factorization.

10891742389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990158410.

The product of its (nonzero) digits is 870912, while the sum is 52.

The spelling of 10891742389 in words is "ten billion, eight hundred ninety-one million, seven hundred forty-two thousand, three hundred eighty-nine".