6121155136 has 28 divisors (see below), whose sum is σ = 12283158060. Its totient is φ = 3026186240.

The previous prime is 6121155119. The next prime is 6121155169. The reversal of 6121155136 is 6315511216.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1685595136 + 4435560000 = 41056^2 + 66600^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6121155098 and 6121155107.

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, 531625 + ... + 543016.

Almost surely, 2^6121155136 is an apocalyptic number.

It is an amenable number.

6121155136 is an abundant number, since it is smaller than the sum of its proper divisors (6162002924).

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

6121155136 is a wasteful number, since it uses less digits than its factorization.

6121155136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074742 (or 1074732 counting only the distinct ones).

The product of its digits is 5400, while the sum is 31.

The square root of 6121155136 is about 78237.8114213326. The cubic root of 6121155136 is about 1829.2699304459.

The spelling of 6121155136 in words is "six billion, one hundred twenty-one million, one hundred fifty-five thousand, one hundred thirty-six".