185452612381 has 2 divisors, whose sum is σ = 185452612382. Its totient is φ = 185452612380.

The previous prime is 185452612363. The next prime is 185452612439. The reversal of 185452612381 is 183216254581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174668828356 + 10783784025 = 417934^2 + 103845^2 .

It is a cyclic number.

It is not a de Polignac number, because 185452612381 - 2⁷ = 185452612253 is a prime.

It is a super-2 number, since 2×185452612381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (185452618381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92726306190 + 92726306191.

It is an arithmetic number, because the mean of its divisors is an integer number (92726306191).

Almost surely, 2^185452612381 is an apocalyptic number.

It is an amenable number.

185452612381 is a deficient number, since it is larger than the sum of its proper divisors (1).

185452612381 is an equidigital number, since it uses as much as digits as its factorization.

185452612381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 460800, while the sum is 46.

The spelling of 185452612381 in words is "one hundred eighty-five billion, four hundred fifty-two million, six hundred twelve thousand, three hundred eighty-one".