891745112427 has 32 divisors (see below), whose sum is σ = 1328426023680. Its totient is φ = 528316091520.

The previous prime is 891745112417. The next prime is 891745112443. The reversal of 891745112427 is 724211547198.

It is not a de Polignac number, because 891745112427 - 2¹⁰ = 891745111403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 891745112427.

It is not an unprimeable number, because it can be changed into a prime (891745112407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 743649 + ... + 1528562.

It is an arithmetic number, because the mean of its divisors is an integer number (41513313240).

Almost surely, 2^891745112427 is an apocalyptic number.

891745112427 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

891745112427 is a deficient number, since it is larger than the sum of its proper divisors (436680911253).

891745112427 is a wasteful number, since it uses less digits than its factorization.

891745112427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272603.

The product of its digits is 1128960, while the sum is 51.

The spelling of 891745112427 in words is "eight hundred ninety-one billion, seven hundred forty-five million, one hundred twelve thousand, four hundred twenty-seven".