2155436444 has 24 divisors (see below), whose sum is σ = 4498303488. Its totient is φ = 883594800.

The previous prime is 2155436377. The next prime is 2155436483. The reversal of 2155436444 is 4446345512.

It is a junction number, because it is equal to n+sod(n) for n = 2155436398 and 2155436407.

It is a congruent number.

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, 1672832 + ... + 1674119.

It is an arithmetic number, because the mean of its divisors is an integer number (187429312).

Almost surely, 2^2155436444 is an apocalyptic number.

It is an amenable number.

2155436444 is an abundant number, since it is smaller than the sum of its proper divisors (2342867044).

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

2155436444 is a wasteful number, since it uses less digits than its factorization.

2155436444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3346985 (or 3346983 counting only the distinct ones).

The product of its digits is 230400, while the sum is 38.

The square root of 2155436444 is about 46426.6781495295. The cubic root of 2155436444 is about 1291.7498125725.

The spelling of 2155436444 in words is "two billion, one hundred fifty-five million, four hundred thirty-six thousand, four hundred forty-four".