181848365401 has 2 divisors, whose sum is σ = 181848365402. Its totient is φ = 181848365400.

The previous prime is 181848365389. The next prime is 181848365507. The reversal of 181848365401 is 104563848181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180921771801 + 926593600 = 425349^2 + 30440^2 .

It is a cyclic number.

It is not a de Polignac number, because 181848365401 - 2²⁹ = 181311494489 is a prime.

It is a super-2 number, since 2×181848365401² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (181848365701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90924182700 + 90924182701.

It is an arithmetic number, because the mean of its divisors is an integer number (90924182701).

Almost surely, 2^181848365401 is an apocalyptic number.

It is an amenable number.

181848365401 is a deficient number, since it is larger than the sum of its proper divisors (1).

181848365401 is an equidigital number, since it uses as much as digits as its factorization.

181848365401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 737280, while the sum is 49.

The spelling of 181848365401 in words is "one hundred eighty-one billion, eight hundred forty-eight million, three hundred sixty-five thousand, four hundred one".