2681378259 has 8 divisors (see below), whose sum is σ = 4085909760. Its totient is φ = 1532216136.

The previous prime is 2681378239. The next prime is 2681378321. The reversal of 2681378259 is 9528731862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-2681378259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2681378209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63842319 + ... + 63842360.

It is an arithmetic number, because the mean of its divisors is an integer number (510738720).

Almost surely, 2^2681378259 is an apocalyptic number.

2681378259 is a deficient number, since it is larger than the sum of its proper divisors (1404531501).

2681378259 is a wasteful number, since it uses less digits than its factorization.

2681378259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127684689.

The product of its digits is 1451520, while the sum is 51.

The square root of 2681378259 is about 51782.0264087840. The cubic root of 2681378259 is about 1389.2679855974.

It can be divided in two parts, 268137 and 8259, that added together give a triangular number (276396 = T₇₄₃).

The spelling of 2681378259 in words is "two billion, six hundred eighty-one million, three hundred seventy-eight thousand, two hundred fifty-nine".