2153155578 has 64 divisors (see below), whose sum is σ = 5084363520. Its totient is φ = 595026432.

The previous prime is 2153155577. The next prime is 2153155591. The reversal of 2153155578 is 8755513512.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (2153155577) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 264838 + ... + 272846.

It is an arithmetic number, because the mean of its divisors is an integer number (79443180).

Almost surely, 2^2153155578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2153155578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2542181760).

2153155578 is an abundant number, since it is smaller than the sum of its proper divisors (2931207942).

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

2153155578 is a wasteful number, since it uses less digits than its factorization.

2153155578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8231.

The product of its digits is 210000, while the sum is 42.

The square root of 2153155578 is about 46402.1074736913. The cubic root of 2153155578 is about 1291.2940119077.

The spelling of 2153155578 in words is "two billion, one hundred fifty-three million, one hundred fifty-five thousand, five hundred seventy-eight".