61115166911 has 2 divisors, whose sum is σ = 61115166912. Its totient is φ = 61115166910.

The previous prime is 61115166883. The next prime is 61115166913. The reversal of 61115166911 is 11966151116.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61115166911 - 2¹⁰ = 61115165887 is a prime.

Together with 61115166913, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61115166913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30557583455 + 30557583456.

It is an arithmetic number, because the mean of its divisors is an integer number (30557583456).

Almost surely, 2^61115166911 is an apocalyptic number.

61115166911 is a deficient number, since it is larger than the sum of its proper divisors (1).

61115166911 is an equidigital number, since it uses as much as digits as its factorization.

61115166911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 38.

The spelling of 61115166911 in words is "sixty-one billion, one hundred fifteen million, one hundred sixty-six thousand, nine hundred eleven".