2155061804 has 48 divisors (see below), whose sum is σ = 4504879680. Its totient is φ = 882524160.

The previous prime is 2155061773. The next prime is 2155061807. The reversal of 2155061804 is 4081605512.

It is not an unprimeable number, because it can be changed into a prime (2155061807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65084 + ... + 92444.

It is an arithmetic number, because the mean of its divisors is an integer number (93851660).

Almost surely, 2^2155061804 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 2155061804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2252439840).

2155061804 is an abundant number, since it is smaller than the sum of its proper divisors (2349817876).

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

2155061804 is a wasteful number, since it uses less digits than its factorization.

2155061804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27498 (or 27496 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 2155061804 is about 46422.6432250470. The cubic root of 2155061804 is about 1291.6749678403.

The spelling of 2155061804 in words is "two billion, one hundred fifty-five million, sixty-one thousand, eight hundred four".