87841697161 has 15 divisors (see below), whose sum is σ = 92834829143. Its totient is φ = 83117087640.

The previous prime is 87841697149. The next prime is 87841697197. The reversal of 87841697161 is 16179614878.

The square root of 87841697161 is 296381.

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

It can be written as a sum of positive squares in only one way, i.e., 23984407161 + 63857290000 = 154869^2 + 252700^2 .

It is not a de Polignac number, because 87841697161 - 2¹³ = 87841688969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87841697096 and 87841697105.

It is not an unprimeable number, because it can be changed into a prime (87841697561) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 106993131 + ... + 106993951.

Almost surely, 2^87841697161 is an apocalyptic number.

87841697161 is the 296381-st square number.

87841697161 is the 148191-st centered octagonal number.

It is an amenable number.

87841697161 is a deficient number, since it is larger than the sum of its proper divisors (4993131982).

87841697161 is an frugal number, since it uses more digits than its factorization.

87841697161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718 (or 840 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 58.

The spelling of 87841697161 in words is "eighty-seven billion, eight hundred forty-one million, six hundred ninety-seven thousand, one hundred sixty-one".