1881184418497 has 2 divisors, whose sum is σ = 1881184418498. Its totient is φ = 1881184418496.

The previous prime is 1881184418489. The next prime is 1881184418573. The reversal of 1881184418497 is 7948144811881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1619622750736 + 261561667761 = 1272644^2 + 511431^2 .

It is a cyclic number.

It is not a de Polignac number, because 1881184418497 - 2³ = 1881184418489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1881184418797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 940592209248 + 940592209249.

It is an arithmetic number, because the mean of its divisors is an integer number (940592209249).

Almost surely, 2^{1881184418497} is an apocalyptic number.

It is an amenable number.

1881184418497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1881184418497 is an equidigital number, since it uses as much as digits as its factorization.

1881184418497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16515072, while the sum is 64.

The spelling of 1881184418497 in words is "one trillion, eight hundred eighty-one billion, one hundred eighty-four million, four hundred eighteen thousand, four hundred ninety-seven".