2155858518 has 32 divisors (see below), whose sum is σ = 4705401600. Its totient is φ = 653052960.

The previous prime is 2155858487. The next prime is 2155858561. The reversal of 2155858518 is 8158585512.

2155858518 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 281808 + ... + 289356.

It is an arithmetic number, because the mean of its divisors is an integer number (147043800).

Almost surely, 2^2155858518 is an apocalyptic number.

2155858518 is an abundant number, since it is smaller than the sum of its proper divisors (2549543082).

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

2155858518 is a wasteful number, since it uses less digits than its factorization.

2155858518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11892.

The product of its digits is 640000, while the sum is 48.

The square root of 2155858518 is about 46431.2235246929. The cubic root of 2155858518 is about 1291.8341231736.

The spelling of 2155858518 in words is "two billion, one hundred fifty-five million, eight hundred fifty-eight thousand, five hundred eighteen".