2154604644 has 96 divisors (see below), whose sum is σ = 5759631360. Its totient is φ = 696175776.

The previous prime is 2154604637. The next prime is 2154604681. The reversal of 2154604644 is 4464064512.

2154604644 is a `hidden beast` number, since 2 + 1 + 5 + 4 + 6 + 0 + 4 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2154604599 and 2154604608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 541149 + ... + 545115.

It is an arithmetic number, because the mean of its divisors is an integer number (59996160).

Almost surely, 2^2154604644 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 2154604644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2879815680).

2154604644 is an abundant number, since it is smaller than the sum of its proper divisors (3605026716).

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

2154604644 is a wasteful number, since it uses less digits than its factorization.

2154604644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4134 (or 4126 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The square root of 2154604644 is about 46417.7190736469. The cubic root of 2154604644 is about 1291.5836256976.

The spelling of 2154604644 in words is "two billion, one hundred fifty-four million, six hundred four thousand, six hundred forty-four".