2155654644 has 48 divisors (see below), whose sum is σ = 5909211840. Its totient is φ = 602979840.

The previous prime is 2155654607. The next prime is 2155654679. The reversal of 2155654644 is 4464565512.

2155654644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 2155654596 and 2155654605.

It is a congruent number.

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, 626389 + ... + 629820.

It is an arithmetic number, because the mean of its divisors is an integer number (123108580).

Almost surely, 2^2155654644 is an apocalyptic number.

It is an amenable number.

2155654644 is an abundant number, since it is smaller than the sum of its proper divisors (3753557196).

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

2155654644 is a wasteful number, since it uses less digits than its factorization.

2155654644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256240 (or 1256238 counting only the distinct ones).

The product of its digits is 576000, while the sum is 42.

The square root of 2155654644 is about 46429.0280320405. The cubic root of 2155654644 is about 1291.7934000788.

The spelling of 2155654644 in words is "two billion, one hundred fifty-five million, six hundred fifty-four thousand, six hundred forty-four".