2155068136 has 16 divisors (see below), whose sum is σ = 4351580100. Its totient is φ = 994646784.

The previous prime is 2155068133. The next prime is 2155068163. The reversal of 2155068136 is 6318605512.

It can be written as a sum of positive squares in 2 ways, for example, as 1520532036 + 634536100 = 38994^2 + 25190^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2155068095 and 2155068104.

It is not an unprimeable number, because it can be changed into a prime (2155068131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10360801 + ... + 10361008.

Almost surely, 2^2155068136 is an apocalyptic number.

2155068136 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2155068136 is an abundant number, since it is smaller than the sum of its proper divisors (2196511964).

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

2155068136 is a wasteful number, since it uses less digits than its factorization.

2155068136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20721828 (or 20721824 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 2155068136 is about 46422.7114244741. The cubic root of 2155068136 is about 1291.6762329050.

The spelling of 2155068136 in words is "two billion, one hundred fifty-five million, sixty-eight thousand, one hundred thirty-six".