4278478769 has 2 divisors, whose sum is σ = 4278478770. Its totient is φ = 4278478768.

The previous prime is 4278478759. The next prime is 4278478783. The reversal of 4278478769 is 9678748724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3646710544 + 631768225 = 60388^2 + 25135^2 .

It is a cyclic number.

It is not a de Polignac number, because 4278478769 - 2⁴ = 4278478753 is a prime.

It is a super-2 number, since 2×4278478769² = 36610761153567510722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4278478759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2139239384 + 2139239385.

It is an arithmetic number, because the mean of its divisors is an integer number (2139239385).

Almost surely, 2^4278478769 is an apocalyptic number.

It is an amenable number.

4278478769 is a deficient number, since it is larger than the sum of its proper divisors (1).

4278478769 is an equidigital number, since it uses as much as digits as its factorization.

4278478769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37933056, while the sum is 62.

The square root of 4278478769 is about 65410.0815547573. The cubic root of 4278478769 is about 1623.4158945576.

The spelling of 4278478769 in words is "four billion, two hundred seventy-eight million, four hundred seventy-eight thousand, seven hundred sixty-nine".