87875331561 has 6 divisors (see below), whose sum is σ = 126931034490. Its totient is φ = 58583554368.

The previous prime is 87875331527. The next prime is 87875331589. The reversal of 87875331561 is 16513357878.

87875331561 is a `hidden beast` number, since 8 + 7 + 8 + 75 + 3 + 3 + 1 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 87453275625 + 422055936 = 295725^2 + 20544^2 .

It is not a de Polignac number, because 87875331561 - 2²¹ = 87873234409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87875331498 and 87875331507.

It is not an unprimeable number, because it can be changed into a prime (87875331521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4881962856 + ... + 4881962873.

It is an arithmetic number, because the mean of its divisors is an integer number (21155172415).

Almost surely, 2^87875331561 is an apocalyptic number.

It is an amenable number.

87875331561 is a deficient number, since it is larger than the sum of its proper divisors (39055702929).

87875331561 is a wasteful number, since it uses less digits than its factorization.

87875331561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9763925735 (or 9763925732 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 54.

The spelling of 87875331561 in words is "eighty-seven billion, eight hundred seventy-five million, three hundred thirty-one thousand, five hundred sixty-one".