185161932113 has 2 divisors, whose sum is σ = 185161932114. Its totient is φ = 185161932112.

The previous prime is 185161932107. The next prime is 185161932121. The reversal of 185161932113 is 311239161581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97858229329 + 87303702784 = 312823^2 + 295472^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-185161932113 is a prime.

It is a super-2 number, since 2×185161932113² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (185161932713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92580966056 + 92580966057.

It is an arithmetic number, because the mean of its divisors is an integer number (92580966057).

Almost surely, 2^185161932113 is an apocalyptic number.

It is an amenable number.

185161932113 is a deficient number, since it is larger than the sum of its proper divisors (1).

185161932113 is an equidigital number, since it uses as much as digits as its factorization.

185161932113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 41.

The spelling of 185161932113 in words is "one hundred eighty-five billion, one hundred sixty-one million, nine hundred thirty-two thousand, one hundred thirteen".