1876678325521 has 2 divisors, whose sum is σ = 1876678325522. Its totient is φ = 1876678325520.

The previous prime is 1876678325519. The next prime is 1876678325539. The reversal of 1876678325521 is 1255238766781.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1127761165521 + 748917160000 = 1061961^2 + 865400^2 .

It is a cyclic number.

It is not a de Polignac number, because 1876678325521 - 2¹ = 1876678325519 is a prime.

Together with 1876678325519, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1876678325521.

It is not a weakly prime, because it can be changed into another prime (1876678325581) by changing a digit.

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 as a sum of consecutive naturals, namely, 938339162760 + 938339162761.

It is an arithmetic number, because the mean of its divisors is an integer number (938339162761).

Almost surely, 2^{1876678325521} is an apocalyptic number.

It is an amenable number.

1876678325521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1876678325521 is an equidigital number, since it uses as much as digits as its factorization.

1876678325521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33868800, while the sum is 61.

The spelling of 1876678325521 in words is "one trillion, eight hundred seventy-six billion, six hundred seventy-eight million, three hundred twenty-five thousand, five hundred twenty-one".