4378278613 has 2 divisors, whose sum is σ = 4378278614. Its totient is φ = 4378278612.

The previous prime is 4378278601. The next prime is 4378278649. The reversal of 4378278613 is 3168728734.

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., 2523856644 + 1854421969 = 50238^2 + 43063^2 .

It is a cyclic number.

It is not a de Polignac number, because 4378278613 - 2⁵ = 4378278581 is a prime.

It is a super-2 number, since 2×4378278613² = 38338647226106407538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4378278013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2189139306 + 2189139307.

It is an arithmetic number, because the mean of its divisors is an integer number (2189139307).

Almost surely, 2^4378278613 is an apocalyptic number.

It is an amenable number.

4378278613 is a deficient number, since it is larger than the sum of its proper divisors (1).

4378278613 is an equidigital number, since it uses as much as digits as its factorization.

4378278613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 49.

The square root of 4378278613 is about 66168.5621197862. The cubic root of 4378278613 is about 1635.9416077670.

The spelling of 4378278613 in words is "four billion, three hundred seventy-eight million, two hundred seventy-eight thousand, six hundred thirteen".