2158538472 has 48 divisors (see below), whose sum is σ = 6153732000. Its totient is φ = 681643296.

The previous prime is 2158538443. The next prime is 2158538509. The reversal of 2158538472 is 2748358512.

2158538472 is a `hidden beast` number, since 21 + 58 + 538 + 47 + 2 = 666.

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 11 ways as a sum of consecutive naturals, for example, 787572 + ... + 790307.

It is an arithmetic number, because the mean of its divisors is an integer number (128202750).

Almost surely, 2^2158538472 is an apocalyptic number.

It is an amenable number.

2158538472 is an abundant number, since it is smaller than the sum of its proper divisors (3995193528).

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

2158538472 is a wasteful number, since it uses less digits than its factorization.

2158538472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577910 (or 1577903 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 2158538472 is about 46460.0739560324. The cubic root of 2158538472 is about 1292.3691957712.

The spelling of 2158538472 in words is "two billion, one hundred fifty-eight million, five hundred thirty-eight thousand, four hundred seventy-two".