842521910459391 has 12 divisors (see below), whose sum is σ = 1231638455451768. Its totient is φ = 554914029378384.

The previous prime is 842521910459347. The next prime is 842521910459393. The reversal of 842521910459391 is 193954019125248.

It is a happy number.

842521910459391 is a `hidden beast` number, since 8 + 4 + 2 + 5 + 2 + 1 + 91 + 0 + 459 + 3 + 91 = 666.

It is not a de Polignac number, because 842521910459391 - 2¹¹ = 842521910457343 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842521910459393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 563937020980 + ... + 563937022473.

It is an arithmetic number, because the mean of its divisors is an integer number (102636537954314).

Almost surely, 2^{842521910459391} is an apocalyptic number.

842521910459391 is a deficient number, since it is larger than the sum of its proper divisors (389116544992377).

842521910459391 is a wasteful number, since it uses less digits than its factorization.

842521910459391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127874043542 (or 1127874043539 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 63.

The spelling of 842521910459391 in words is "eight hundred forty-two trillion, five hundred twenty-one billion, nine hundred ten million, four hundred fifty-nine thousand, three hundred ninety-one".