6151689856 has 128 divisors (see below), whose sum is σ = 13891041360. Its totient is φ = 2694021120.

The previous prime is 6151689847. The next prime is 6151689899. The reversal of 6151689856 is 6589861516.

It can be written as a sum of positive squares in 8 ways, for example, as 3205371456 + 2946318400 = 56616^2 + 54280^2 .

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 6151689797 and 6151689806.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2523070 + ... + 2525506.

Almost surely, 2^6151689856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6151689856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6945520680).

6151689856 is an abundant number, since it is smaller than the sum of its proper divisors (7739351504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6151689856 is a wasteful number, since it uses less digits than its factorization.

6151689856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2542 (or 2530 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 55.

The square root of 6151689856 is about 78432.7090951218. The cubic root of 6151689856 is about 1832.3065917090.

The spelling of 6151689856 in words is "six billion, one hundred fifty-one million, six hundred eighty-nine thousand, eight hundred fifty-six".