4378167881 has 2 divisors, whose sum is σ = 4378167882. Its totient is φ = 4378167880.

The previous prime is 4378167877. The next prime is 4378167883. The reversal of 4378167881 is 1887618734.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3276990025 + 1101177856 = 57245^2 + 33184^2 .

It is a cyclic number.

It is not a de Polignac number, because 4378167881 - 2² = 4378167877 is a prime.

It is a super-2 number, since 2×4378167881² = 38336707988440060322, which contains 22 as substring.

Together with 4378167883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4378167883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2189083940 + 2189083941.

It is an arithmetic number, because the mean of its divisors is an integer number (2189083941).

Almost surely, 2^4378167881 is an apocalyptic number.

It is an amenable number.

4378167881 is a deficient number, since it is larger than the sum of its proper divisors (1).

4378167881 is an equidigital number, since it uses as much as digits as its factorization.

4378167881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1806336, while the sum is 53.

The square root of 4378167881 is about 66167.7253727223. The cubic root of 4378167881 is about 1635.9278159986.

The spelling of 4378167881 in words is "four billion, three hundred seventy-eight million, one hundred sixty-seven thousand, eight hundred eighty-one".