891406343154063 has 128 divisors (see below), whose sum is σ = 1362481581772800. Its totient is φ = 513780195456000.

The previous prime is 891406343154053. The next prime is 891406343154079. The reversal of 891406343154063 is 360451343604198.

It is a happy number.

891406343154063 is an astonishing number since 891406343154063 = 8914063 + ... + 43154063.

It is not a de Polignac number, because 891406343154063 - 2⁹ = 891406343153551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 891406343153994 and 891406343154012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891406343154053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1535719548 + ... + 1536299886.

It is an arithmetic number, because the mean of its divisors is an integer number (10644387357600).

Almost surely, 2^{891406343154063} is an apocalyptic number.

891406343154063 is a deficient number, since it is larger than the sum of its proper divisors (471075238618737).

891406343154063 is a wasteful number, since it uses less digits than its factorization.

891406343154063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580693.

The product of its (nonzero) digits is 22394880, while the sum is 57.

The spelling of 891406343154063 in words is "eight hundred ninety-one trillion, four hundred six billion, three hundred forty-three million, one hundred fifty-four thousand, sixty-three".