1878043732049 has 2 divisors, whose sum is σ = 1878043732050. Its totient is φ = 1878043732048.

The previous prime is 1878043731997. The next prime is 1878043732079. The reversal of 1878043732049 is 9402373408781.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1160876953600 + 717166778449 = 1077440^2 + 846857^2 .

It is a cyclic number.

It is not a de Polignac number, because 1878043732049 - 2⁸ = 1878043731793 is a prime.

It is a super-4 number, since 4×1878043732049⁴ (a number of 50 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1878043731985 and 1878043732003.

It is not a weakly prime, because it can be changed into another prime (1878043732079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 939021866024 + 939021866025.

It is an arithmetic number, because the mean of its divisors is an integer number (939021866025).

Almost surely, 2^{1878043732049} is an apocalyptic number.

It is an amenable number.

1878043732049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1878043732049 is an equidigital number, since it uses as much as digits as its factorization.

1878043732049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 1878043732049 in words is "one trillion, eight hundred seventy-eight billion, forty-three million, seven hundred thirty-two thousand, forty-nine".