7786454138 has 8 divisors (see below), whose sum is σ = 12366721332. Its totient is φ = 3664213696.

The previous prime is 7786454099. The next prime is 7786454149. The reversal of 7786454138 is 8314546877.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7623559969 + 162894169 = 87313^2 + 12763^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 7786454138.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114506645 + ... + 114506712.

Almost surely, 2^7786454138 is an apocalyptic number.

7786454138 is a deficient number, since it is larger than the sum of its proper divisors (4580267194).

7786454138 is a wasteful number, since it uses less digits than its factorization.

7786454138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229013376.

The product of its digits is 4515840, while the sum is 53.

The square root of 7786454138 is about 88240.8869969018. The cubic root of 7786454138 is about 1982.0437810631.

The spelling of 7786454138 in words is "seven billion, seven hundred eighty-six million, four hundred fifty-four thousand, one hundred thirty-eight".