6856562155 has 8 divisors (see below), whose sum is σ = 8234907984. Its totient is φ = 5480560800.

The previous prime is 6856562123. The next prime is 6856562171. The reversal of 6856562155 is 5512656586.

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

It is not a de Polignac number, because 6856562155 - 2⁵ = 6856562123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6856562099 and 6856562108.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579676 + ... + 591385.

It is an arithmetic number, because the mean of its divisors is an integer number (1029363498).

Almost surely, 2^6856562155 is an apocalyptic number.

6856562155 is a deficient number, since it is larger than the sum of its proper divisors (1378345829).

6856562155 is a wasteful number, since it uses less digits than its factorization.

6856562155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172237.

The product of its digits is 2160000, while the sum is 49.

The square root of 6856562155 is about 82804.3607245416. The cubic root of 6856562155 is about 1899.7748722180.

The spelling of 6856562155 in words is "six billion, eight hundred fifty-six million, five hundred sixty-two thousand, one hundred fifty-five".