2809644991379 has 8 divisors (see below), whose sum is σ = 3047477208048. Its totient is φ = 2579874883840.

The previous prime is 2809644991327. The next prime is 2809644991393. The reversal of 2809644991379 is 9731994469082.

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

It is a cyclic number.

It is not a de Polignac number, because 2809644991379 - 2⁸ = 2809644991123 is a prime.

It is a super-2 number, since 2×2809644991379² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2809644921379) 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, 2015526557 + ... + 2015527950.

It is an arithmetic number, because the mean of its divisors is an integer number (380934651006).

Almost surely, 2^{2809644991379} is an apocalyptic number.

2809644991379 is a deficient number, since it is larger than the sum of its proper divisors (237832216669).

2809644991379 is a wasteful number, since it uses less digits than its factorization.

2809644991379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4031054565.

The product of its (nonzero) digits is 211631616, while the sum is 71.

The spelling of 2809644991379 in words is "two trillion, eight hundred nine billion, six hundred forty-four million, nine hundred ninety-one thousand, three hundred seventy-nine".