6139857855 has 16 divisors (see below), whose sum is σ = 9874677600. Its totient is φ = 3257622528.

The previous prime is 6139857851. The next prime is 6139857881. The reversal of 6139857855 is 5587589316.

It is a happy number.

It is not a de Polignac number, because 6139857855 - 2² = 6139857851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6139857795 and 6139857804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6139857851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1057530 + ... + 1063319.

It is an arithmetic number, because the mean of its divisors is an integer number (617167350).

Almost surely, 2^6139857855 is an apocalyptic number.

6139857855 is a deficient number, since it is larger than the sum of its proper divisors (3734819745).

6139857855 is a wasteful number, since it uses less digits than its factorization.

6139857855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121050.

The product of its digits is 9072000, while the sum is 57.

The square root of 6139857855 is about 78357.2450702550. The cubic root of 6139857855 is about 1831.1311007304.

The spelling of 6139857855 in words is "six billion, one hundred thirty-nine million, eight hundred fifty-seven thousand, eight hundred fifty-five".