381354688877 has 2 divisors, whose sum is σ = 381354688878. Its totient is φ = 381354688876.

The previous prime is 381354688873. The next prime is 381354688879. The reversal of 381354688877 is 778886453183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 350329036996 + 31025651881 = 591886^2 + 176141^2 .

It is an emirp because it is prime and its reverse (778886453183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381354688877 - 2² = 381354688873 is a prime.

It is a super-2 number, since 2×381354688877² (a number of 24 digits) contains 22 as substring.

Together with 381354688879, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381354688873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190677344438 + 190677344439.

It is an arithmetic number, because the mean of its divisors is an integer number (190677344439).

Almost surely, 2^381354688877 is an apocalyptic number.

It is an amenable number.

381354688877 is a deficient number, since it is larger than the sum of its proper divisors (1).

381354688877 is an equidigital number, since it uses as much as digits as its factorization.

381354688877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216760320, while the sum is 68.

The spelling of 381354688877 in words is "three hundred eighty-one billion, three hundred fifty-four million, six hundred eighty-eight thousand, eight hundred seventy-seven".