874844079561 has 27 divisors (see below), whose sum is σ = 1273387895949. Its totient is φ = 578775340152.

The previous prime is 874844079533. The next prime is 874844079569. The reversal of 874844079561 is 165970448478.

The square root of 874844079561 is 935331.

It is a perfect power (a square), and thus also a powerful number.

874844079561 is a `hidden beast` number, since 8 + 7 + 4 + 84 + 407 + 95 + 61 = 666.

It is not a de Polignac number, because 874844079561 - 2⁷ = 874844079433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (874844079569) 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 26 ways as a sum of consecutive naturals, for example, 390031906 + ... + 390034148.

Almost surely, 2^874844079561 is an apocalyptic number.

874844079561 is the 935331-st square number.

874844079561 is the 467666-th centered octagonal number.

It is an amenable number.

874844079561 is a deficient number, since it is larger than the sum of its proper divisors (398543816388).

874844079561 is an frugal number, since it uses more digits than its factorization.

874844079561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4770 (or 2385 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 63.

The spelling of 874844079561 in words is "eight hundred seventy-four billion, eight hundred forty-four million, seventy-nine thousand, five hundred sixty-one".