6139345678 has 4 divisors (see below), whose sum is σ = 9209018520. Its totient is φ = 3069672838.

The previous prime is 6139345651. The next prime is 6139345687. The reversal of 6139345678 is 8765439316.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1534836418 + ... + 1534836421.

It is an arithmetic number, because the mean of its divisors is an integer number (2302254630).

Almost surely, 2^6139345678 is an apocalyptic number.

6139345678 is a deficient number, since it is larger than the sum of its proper divisors (3069672842).

6139345678 is a wasteful number, since it uses less digits than its factorization.

6139345678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3069672841.

The product of its digits is 3265920, while the sum is 52.

The square root of 6139345678 is about 78353.9767848448. The cubic root of 6139345678 is about 1831.0801826508.

The spelling of 6139345678 in words is "six billion, one hundred thirty-nine million, three hundred forty-five thousand, six hundred seventy-eight".