2158477568 has 72 divisors (see below), whose sum is σ = 4676312256. Its totient is φ = 988416000.

The previous prime is 2158477567. The next prime is 2158477589. The reversal of 2158477568 is 8657748512.

It is not an unprimeable number, because it can be changed into a prime (2158477567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433493 + ... + 438443.

Almost surely, 2^2158477568 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 2158477568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2338156128).

2158477568 is an abundant number, since it is smaller than the sum of its proper divisors (2517834688).

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

2158477568 is a wasteful number, since it uses less digits than its factorization.

2158477568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5111 (or 5097 counting only the distinct ones).

The product of its digits is 3763200, while the sum is 53.

The square root of 2158477568 is about 46459.4185069077. The cubic root of 2158477568 is about 1292.3570407576.

The spelling of 2158477568 in words is "two billion, one hundred fifty-eight million, four hundred seventy-seven thousand, five hundred sixty-eight".