2678597559409 has 2 divisors, whose sum is σ = 2678597559410. Its totient is φ = 2678597559408.

The previous prime is 2678597559367. The next prime is 2678597559427. The reversal of 2678597559409 is 9049557958762.

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., 2221432259809 + 457165299600 = 1490447^2 + 676140^2 .

It is a cyclic number.

It is not a de Polignac number, because 2678597559409 - 2¹⁵ = 2678597526641 is a prime.

It is not a weakly prime, because it can be changed into another prime (2678597559109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1339298779704 + 1339298779705.

It is an arithmetic number, because the mean of its divisors is an integer number (1339298779705).

Almost surely, 2^{2678597559409} is an apocalyptic number.

It is an amenable number.

2678597559409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2678597559409 is an equidigital number, since it uses as much as digits as its factorization.

2678597559409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1714608000, while the sum is 76.

The spelling of 2678597559409 in words is "two trillion, six hundred seventy-eight billion, five hundred ninety-seven million, five hundred fifty-nine thousand, four hundred nine".