1878856777951 has 2 divisors, whose sum is σ = 1878856777952. Its totient is φ = 1878856777950.

The previous prime is 1878856777927. The next prime is 1878856778027. The reversal of 1878856777951 is 1597776588781.

It is a weak prime.

It is an emirp because it is prime and its reverse (1597776588781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1878856777951 - 2¹³ = 1878856769759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1878856777051) 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, 939428388975 + 939428388976.

It is an arithmetic number, because the mean of its divisors is an integer number (939428388976).

Almost surely, 2^{1878856777951} is an apocalyptic number.

1878856777951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1878856777951 is an equidigital number, since it uses as much as digits as its factorization.

1878856777951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1659571200, while the sum is 79.

The spelling of 1878856777951 in words is "one trillion, eight hundred seventy-eight billion, eight hundred fifty-six million, seven hundred seventy-seven thousand, nine hundred fifty-one".