7881877256413 has 4 divisors (see below), whose sum is σ = 8074118165148. Its totient is φ = 7689636347680.

The previous prime is 7881877256399. The next prime is 7881877256447. The reversal of 7881877256413 is 3146527781887.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 443591964729 + 7438285291684 = 666027^2 + 2727322^2 .

It is a cyclic number.

It is not a de Polignac number, because 7881877256413 - 2⁵ = 7881877256381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7881877256453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96120454306 + ... + 96120454387.

It is an arithmetic number, because the mean of its divisors is an integer number (2018529541287).

Almost surely, 2^{7881877256413} is an apocalyptic number.

It is an amenable number.

7881877256413 is a deficient number, since it is larger than the sum of its proper divisors (192240908735).

7881877256413 is a wasteful number, since it uses less digits than its factorization.

7881877256413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192240908734.

The product of its digits is 126443520, while the sum is 67.

The spelling of 7881877256413 in words is "seven trillion, eight hundred eighty-one billion, eight hundred seventy-seven million, two hundred fifty-six thousand, four hundred thirteen".