874823001561 has 12 divisors (see below), whose sum is σ = 1264409910192. Its totient is φ = 582856864056.

The previous prime is 874823001517. The next prime is 874823001589. The reversal of 874823001561 is 165100328478.

874823001561 is a `hidden beast` number, since 8 + 7 + 4 + 82 + 3 + 0 + 0 + 1 + 561 = 666.

It is not a de Polignac number, because 874823001561 - 2¹¹ = 874822999513 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (874823001961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29857071 + ... + 29886356.

It is an arithmetic number, because the mean of its divisors is an integer number (105367492516).

Almost surely, 2^874823001561 is an apocalyptic number.

It is an amenable number.

874823001561 is a deficient number, since it is larger than the sum of its proper divisors (389586908631).

874823001561 is a wasteful number, since it uses less digits than its factorization.

874823001561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59745060 (or 59745057 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 874823001561 in words is "eight hundred seventy-four billion, eight hundred twenty-three million, one thousand, five hundred sixty-one".