2158825536 has 252 divisors, whose sum is σ = 7251508992. Its totient is φ = 614041344.

The previous prime is 2158825531. The next prime is 2158825547. The reversal of 2158825536 is 6355288512.

2158825536 is a `hidden beast` number, since 2 + 15 + 8 + 82 + 553 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (252).

It is a junction number, because it is equal to n+sod(n) for n = 2158825491 and 2158825500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158825531) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9680721 + ... + 9680943.

Almost surely, 2^2158825536 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 2158825536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3625754496).

2158825536 is an abundant number, since it is smaller than the sum of its proper divisors (5092683456).

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

2158825536 is an frugal number, since it uses more digits than its factorization.

2158825536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 235 counting only the distinct ones).

The product of its digits is 576000, while the sum is 45.

The square root of 2158825536 is about 46463.1632156055. The cubic root of 2158825536 is about 1292.4264839519.

The spelling of 2158825536 in words is "two billion, one hundred fifty-eight million, eight hundred twenty-five thousand, five hundred thirty-six".