10891742391 has 24 divisors (see below), whose sum is σ = 16429735296. Its totient is φ = 6939876240.

The previous prime is 10891742363. The next prime is 10891742441. The reversal of 10891742391 is 19324719801.

10891742391 is a `hidden beast` number, since 10 + 89 + 174 + 2 + 391 = 666.

10891742391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10891742391 - 2⁶ = 10891742327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10891742311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 245076 + ... + 286086.

It is an arithmetic number, because the mean of its divisors is an integer number (684572304).

Almost surely, 2^10891742391 is an apocalyptic number.

10891742391 is a deficient number, since it is larger than the sum of its proper divisors (5537992905).

10891742391 is a wasteful number, since it uses less digits than its factorization.

10891742391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42323 (or 42320 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The spelling of 10891742391 in words is "ten billion, eight hundred ninety-one million, seven hundred forty-two thousand, three hundred ninety-one".