2678819497 has 8 divisors (see below), whose sum is σ = 2695727552. Its totient is φ = 2661951600.

The previous prime is 2678819483. The next prime is 2678819513. The reversal of 2678819497 is 7949188762.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2678819497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2678819417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129868 + ... + 149074.

It is an arithmetic number, because the mean of its divisors is an integer number (336965944).

Almost surely, 2^2678819497 is an apocalyptic number.

It is an amenable number.

2678819497 is a deficient number, since it is larger than the sum of its proper divisors (16908055).

2678819497 is a wasteful number, since it uses less digits than its factorization.

2678819497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20079.

The product of its digits is 12192768, while the sum is 61.

The square root of 2678819497 is about 51757.3134638961. The cubic root of 2678819497 is about 1388.8259321538.

The spelling of 2678819497 in words is "two billion, six hundred seventy-eight million, eight hundred nineteen thousand, four hundred ninety-seven".