87275666121161 has 24 divisors (see below), whose sum is σ = 101925412982280. Its totient is φ = 74512618639872.

The previous prime is 87275666121131. The next prime is 87275666121181. The reversal of 87275666121161 is 16112166657278.

It can be written as a sum of positive squares in 4 ways, for example, as 5372804120761 + 81902862000400 = 2317931^2 + 9050020^2 .

It is not a de Polignac number, because 87275666121161 - 2²⁶ = 87275599012297 is a prime.

It is a super-2 number, since 2×87275666121161² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87275666121161.

It is not an unprimeable number, because it can be changed into a prime (87275666121121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57203921 + ... + 58709793.

It is an arithmetic number, because the mean of its divisors is an integer number (4246892207595).

Almost surely, 2^{87275666121161} is an apocalyptic number.

It is an amenable number.

87275666121161 is a deficient number, since it is larger than the sum of its proper divisors (14649746861119).

87275666121161 is a wasteful number, since it uses less digits than its factorization.

87275666121161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510553 (or 1510546 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 59.

The spelling of 87275666121161 in words is "eighty-seven trillion, two hundred seventy-five billion, six hundred sixty-six million, one hundred twenty-one thousand, one hundred sixty-one".