7871439479449 has 16 divisors (see below), whose sum is σ = 9689376766720. Its totient is φ = 6227019167040.

The previous prime is 7871439479437. The next prime is 7871439479459. The reversal of 7871439479449 is 9449749341787.

It is a de Polignac number, because none of the positive numbers 2^k-7871439479449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7871439479459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5867682 + ... + 7083259.

It is an arithmetic number, because the mean of its divisors is an integer number (605586047920).

Almost surely, 2^{7871439479449} is an apocalyptic number.

It is an amenable number.

7871439479449 is a deficient number, since it is larger than the sum of its proper divisors (1817937287271).

7871439479449 is a wasteful number, since it uses less digits than its factorization.

7871439479449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12957640.

The product of its digits is 1536288768, while the sum is 76.

The spelling of 7871439479449 in words is "seven trillion, eight hundred seventy-one billion, four hundred thirty-nine million, four hundred seventy-nine thousand, four hundred forty-nine".