2787554142409 has 3 divisors (see below), whose sum is σ = 2787555812007. Its totient is φ = 2787552472812.

The previous prime is 2787554142353. The next prime is 2787554142433. The reversal of 2787554142409 is 9042414557872.

The square root of 2787554142409 is 1669597.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 2768113975225 + 19440167184 = 1663765^2 + 139428^2 .

It is not a de Polignac number, because 2787554142409 - 2⁷ = 2787554142281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2787554142469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 834799 + ... + 2504395.

It is an arithmetic number, because the mean of its divisors is an integer number (929185270669).

Almost surely, 2^{2787554142409} is an apocalyptic number.

2787554142409 is the 1669597-th square number.

2787554142409 is the 834799-th centered octagonal number.

It is an amenable number.

2787554142409 is a deficient number, since it is larger than the sum of its proper divisors (1669598).

2787554142409 is an frugal number, since it uses more digits than its factorization.

2787554142409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3339194 (or 1669597 counting only the distinct ones).

The product of its (nonzero) digits is 22579200, while the sum is 58.

The spelling of 2787554142409 in words is "two trillion, seven hundred eighty-seven billion, five hundred fifty-four million, one hundred forty-two thousand, four hundred nine".