2579778796915 has 8 divisors (see below), whose sum is σ = 3095813482128. Its totient is φ = 2063770420320.

The previous prime is 2579778796897. The next prime is 2579778796927. The reversal of 2579778796915 is 5196978779752.

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

It is not a de Polignac number, because 2579778796915 - 2¹⁷ = 2579778665843 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6360777 + ... + 6754186.

It is an arithmetic number, because the mean of its divisors is an integer number (386976685266).

Almost surely, 2^{2579778796915} is an apocalyptic number.

2579778796915 is a deficient number, since it is larger than the sum of its proper divisors (516034685213).

2579778796915 is a wasteful number, since it uses less digits than its factorization.

2579778796915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13154309.

The product of its digits is 4200789600, while the sum is 82.

The spelling of 2579778796915 in words is "two trillion, five hundred seventy-nine billion, seven hundred seventy-eight million, seven hundred ninety-six thousand, nine hundred fifteen".