28696207181 has 2 divisors, whose sum is σ = 28696207182. Its totient is φ = 28696207180.

The previous prime is 28696207109. The next prime is 28696207201. The reversal of 28696207181 is 18170269682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20401551556 + 8294655625 = 142834^2 + 91075^2 .

It is a cyclic number.

It is not a de Polignac number, because 28696207181 - 2¹⁰ = 28696206157 is a prime.

It is a super-2 number, since 2×28696207181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28696207381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14348103590 + 14348103591.

It is an arithmetic number, because the mean of its divisors is an integer number (14348103591).

Almost surely, 2^28696207181 is an apocalyptic number.

It is an amenable number.

28696207181 is a deficient number, since it is larger than the sum of its proper divisors (1).

28696207181 is an equidigital number, since it uses as much as digits as its factorization.

28696207181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 50.

The spelling of 28696207181 in words is "twenty-eight billion, six hundred ninety-six million, two hundred seven thousand, one hundred eighty-one".