181401327297919 has 2 divisors, whose sum is σ = 181401327297920. Its totient is φ = 181401327297918.

The previous prime is 181401327297913. The next prime is 181401327297973. The reversal of 181401327297919 is 919792723104181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 181401327297919 - 2¹³ = 181401327289727 is a prime.

It is a super-2 number, since 2×181401327297919² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181401327297913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90700663648959 + 90700663648960.

It is an arithmetic number, because the mean of its divisors is an integer number (90700663648960).

Almost surely, 2^{181401327297919} is an apocalyptic number.

181401327297919 is a deficient number, since it is larger than the sum of its proper divisors (1).

181401327297919 is an equidigital number, since it uses as much as digits as its factorization.

181401327297919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13716864, while the sum is 64.

The spelling of 181401327297919 in words is "one hundred eighty-one trillion, four hundred one billion, three hundred twenty-seven million, two hundred ninety-seven thousand, nine hundred nineteen".