1487821434881 has 2 divisors, whose sum is σ = 1487821434882. Its totient is φ = 1487821434880.

The previous prime is 1487821434829. The next prime is 1487821434899. The reversal of 1487821434881 is 1884341287841.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1466135927281 + 21685507600 = 1210841^2 + 147260^2 .

It is a cyclic number.

It is not a de Polignac number, because 1487821434881 - 2⁶ = 1487821434817 is a prime.

It is a super-2 number, since 2×1487821434881² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1487821434881.

It is not a weakly prime, because it can be changed into another prime (1487821434811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 743910717440 + 743910717441.

It is an arithmetic number, because the mean of its divisors is an integer number (743910717441).

Almost surely, 2^{1487821434881} is an apocalyptic number.

It is an amenable number.

1487821434881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1487821434881 is an equidigital number, since it uses as much as digits as its factorization.

1487821434881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11010048, while the sum is 59.

The spelling of 1487821434881 in words is "one trillion, four hundred eighty-seven billion, eight hundred twenty-one million, four hundred thirty-four thousand, eight hundred eighty-one".