108511085261 has 2 divisors, whose sum is σ = 108511085262. Its totient is φ = 108511085260.

The previous prime is 108511085227. The next prime is 108511085297. The reversal of 108511085261 is 162580115801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101191427236 + 7319658025 = 318106^2 + 85555^2 .

It is a cyclic number.

It is not a de Polignac number, because 108511085261 - 2²² = 108506890957 is a prime.

It is a super-2 number, since 2×108511085261² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108511085201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54255542630 + 54255542631.

It is an arithmetic number, because the mean of its divisors is an integer number (54255542631).

Almost surely, 2^108511085261 is an apocalyptic number.

It is an amenable number.

108511085261 is a deficient number, since it is larger than the sum of its proper divisors (1).

108511085261 is an equidigital number, since it uses as much as digits as its factorization.

108511085261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 38.

The spelling of 108511085261 in words is "one hundred eight billion, five hundred eleven million, eighty-five thousand, two hundred sixty-one".