10891742605 has 4 divisors (see below), whose sum is σ = 13070091132. Its totient is φ = 8713394080.

The previous prime is 10891742591. The next prime is 10891742629. The reversal of 10891742605 is 50624719801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3580466569 + 7311276036 = 59837^2 + 85506^2 .

It is not a de Polignac number, because 10891742605 - 2⁵ = 10891742573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1089174256 + ... + 1089174265.

It is an arithmetic number, because the mean of its divisors is an integer number (3267522783).

Almost surely, 2^10891742605 is an apocalyptic number.

It is an amenable number.

10891742605 is a deficient number, since it is larger than the sum of its proper divisors (2178348527).

10891742605 is an equidigital number, since it uses as much as digits as its factorization.

10891742605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178348526.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 10891742605 in words is "ten billion, eight hundred ninety-one million, seven hundred forty-two thousand, six hundred five".