7188861161 has 2 divisors, whose sum is σ = 7188861162. Its totient is φ = 7188861160.

The previous prime is 7188861149. The next prime is 7188861167. The reversal of 7188861161 is 1611688817.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6778393561 + 410467600 = 82331^2 + 20260^2 .

It is a cyclic number.

It is not a de Polignac number, because 7188861161 - 2¹⁴ = 7188844777 is a prime.

It is a super-3 number, since 3×7188861161³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (7188861167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3594430580 + 3594430581.

It is an arithmetic number, because the mean of its divisors is an integer number (3594430581).

Almost surely, 2^7188861161 is an apocalyptic number.

It is an amenable number.

7188861161 is a deficient number, since it is larger than the sum of its proper divisors (1).

7188861161 is an equidigital number, since it uses as much as digits as its factorization.

7188861161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 47.

The square root of 7188861161 is about 84787.1520986523. The cubic root of 7188861161 is about 1929.9824746277.

The spelling of 7188861161 in words is "seven billion, one hundred eighty-eight million, eight hundred sixty-one thousand, one hundred sixty-one".