2155427604 has 96 divisors (see below), whose sum is σ = 6105415680. Its totient is φ = 652168800.

The previous prime is 2155427597. The next prime is 2155427623. The reversal of 2155427604 is 4067245512.

It is a happy number.

2155427604 is a `hidden beast` number, since 2 + 1 + 5 + 5 + 42 + 7 + 604 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1295277 + ... + 1296939.

It is an arithmetic number, because the mean of its divisors is an integer number (63598080).

Almost surely, 2^2155427604 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 2155427604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3052707840).

2155427604 is an abundant number, since it is smaller than the sum of its proper divisors (3949988076).

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

2155427604 is a wasteful number, since it uses less digits than its factorization.

2155427604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2778 (or 2770 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 2155427604 is about 46426.5829455496. The cubic root of 2155427604 is about 1291.7480466372.

The spelling of 2155427604 in words is "two billion, one hundred fifty-five million, four hundred twenty-seven thousand, six hundred four".